please help because my charger is rated @ 0.1A which means 100mA only? (wth) I googled and found out that 700mA is the oem batt charger for xperia x1 some use 1A others 1.5A please help thanks. Cause I'm buying a new charger rated at 1A so it would charge faster
Yes, the higher the mA the more juice can be drawn from it.
Many people think that it means it will only put out that current, but current is drawn not pushed, and an electrical device will draw as much as it needs.
With a NiMH type rechargable battery, there's a simple formula to work out the charging time.
C is the capacity of the battery.
1.4C/mA
So a 1000mAH NiMH battery charged at 1000mA would take 1.4 hours to charge.
However, Lithium batteries are not simple to charge without blowing them up, hence the need for a charging circuit.
The charging circuit should take only as much current as it needs to charge the battery safely, so a 2A charger would probably be overkill although it would most likely enable you to run TomTom, Opera, and watch a movie while charging in the quickest possible time
If you're charging while using the device heavily (GPS/Wifi/3G browsing) then 1A charger would be better, but if you normally just leave the phone charging without using it then 600mA normally does the job.
i think 2A charger would kill the battery. Can you suggest a 1A charger OEM htc for my xperia x1? thanks
henryfranz2005 said:
i think 2A charger would kill the battery. Can you suggest a 1A charger OEM htc for my xperia x1? thanks
Click to expand...
Click to collapse
You've fallen for what I mentioned in my second sentance.
A 2A power supply does not only provide 2A, it provides anything up to 2A.
So if your phone only draws 1A, it will only provide 1A.
The phone is the charger, the thing we think of as the charger is actually just a power supply.
Unless someone has the spec sheets for the charging circuit in the phone, we don't know the maximum rate at which it will charge the battery.
One way to find out would be to discharge the battery to a level where the phone won't turn on, then without turning the phone on, set it charging.
Time how long it takes for the LED to turn green.
Divide 1230 by the time in hours that it took and you've got roughly the current drawn to charge it.
Say it takes 90 minutes with a 1A power supply, so that's a maximum charge rate of 800mA, so even if you connected it up to a 5A power supply, it will still only charge at 800mA.
So, you connect it up to your 1A power supply, that means with the phone on you've got a "spare" 200mA to play with.
If the phone isn't using more than 200mA to just "run" itself, then you'll charge a battery in the 90 minutes.
However, say you start your sat nav app, it draws 400mA (guess), the charging circuit drops to use only 600mA, taking longer to charge but allowing you to find where you're driving too.
While you're navigating to a restaurant, you want to phone ahead to confirm the reservation, so you open up Opera and search google with a 3G connection, that takes another 400mA (guess). The charging circuit now only has 200mA to use. Your battery isn't getting much charge.
Imagine using a 600mA power supply instead and you can see how you could get to the situation where despite being plugged in, your battery is running down.
I've used 400mA to demonstrate the impact, of course they real values are lower, otherwise you'd only get an hour's use out of having GPS and 3G enabled. Hmm, then again...
thanks for helping me here I decided that I would buy a new charger. (1A) because my charger is not drawing enough amperes (my charger is rated at 0.1A believe me. I thought I read the specs wrong. But it takes roughly 18 hrs to fully charge my battery.
I input my battery specs here http://www.csgnetwork.com/batterychgcalc.html
and yeah I think the computation is correct. Thanks SIR XACCERS
xaccers said:
You've fallen for what I mentioned in my second sentance.
A 2A power supply does not only provide 2A, it provides anything up to 2A.
So if your phone only draws 1A, it will only provide 1A.
The phone is the charger, the thing we think of as the charger is actually just a power supply.
Unless someone has the spec sheets for the charging circuit in the phone, we don't know the maximum rate at which it will charge the battery.
One way to find out would be to discharge the battery to a level where the phone won't turn on, then without turning the phone on, set it charging.
Time how long it takes for the LED to turn green.
Divide 1230 by the time in hours that it took and you've got roughly the current drawn to charge it.
Say it takes 90 minutes with a 1A power supply, so that's a maximum charge rate of 800mA, so even if you connected it up to a 5A power supply, it will still only charge at 800mA.
So, you connect it up to your 1A power supply, that means with the phone on you've got a "spare" 200mA to play with.
If the phone isn't using more than 200mA to just "run" itself, then you'll charge a battery in the 90 minutes.
However, say you start your sat nav app, it draws 400mA (guess), the charging circuit drops to use only 600mA, taking longer to charge but allowing you to find where you're driving too.
While you're navigating to a restaurant, you want to phone ahead to confirm the reservation, so you open up Opera and search google with a 3G connection, that takes another 400mA (guess). The charging circuit now only has 200mA to use. Your battery isn't getting much charge.
Imagine using a 600mA power supply instead and you can see how you could get to the situation where despite being plugged in, your battery is running down.
I've used 400mA to demonstrate the impact, of course they real values are lower, otherwise you'd only get an hour's use out of having GPS and 3G enabled. Hmm, then again...
Click to expand...
Click to collapse
you're correct sir. It would take 90MINUTES to charge my phone using 1A
you're so cool sir
henryfranz2005 said:
you're correct sir. It would take 90MINUTES to charge my phone using 1A
you're so cool sir
Click to expand...
Click to collapse
Happy to have enlightened
Just wish I could have been more helpful in suggesting which to buy.
Just be careful in using a charger with high Amp rating. I have 2 chargers- 1 charges my phone in more or less an hour, the other in almost half a day (so I don't use it).
One time, my battery got drained, so no problem, I plugged it in to charge. To my horror, it wasn't charging (no blinking light). sometimes I get a blinking red light, and the power button emits a red light. So I wasn't all that bothered, I thought it might need some more time to charge, so I left it alone. But the day was fast ending, without anything happening, and I needed my phone the next day for work. So I went to have it checked, the tech said it was a battery problem, so I just bought a replacement battery.
After 2 days, the same thing happened. Not charging, Red light blinking and annoying me to death. I went and had the battery replaced again.
A few days passed, so far so good, nothing happened. I just made sure that I don't let my battery drain and charge it as soon as it falls below half.
One night, I attended a party and wasn't paying too much attention to my phone. You can guess what happened, the battery went dead. I couldn't find my (fast-charging) charger, so I used the other one while I looked for it- still wasn't charging.
I couldn't find it, so I got ready to go have the battery replaced again. But then it blinked. I thought my mind might be playing tricks with me. It blinked again. (actually it wasn't blinking, it was kind of like that slow color-changing when you open the phone). I pressed the power button. It's alive!
This happened several times already, so to make the long story short. It's the charger's fault. Now, its the charger with the low amphere rating that I bring with me, even if it does charge slowly. I only use the other one, when I'm pressed for time.
Sorry for the long post. Just wanted to share my story.
Sounds like it's the fault of the battery monitor in the phone letting the voltage of the battery drop too low damaging the cell.
A low current charge can often bring such a damaged cell back to life, where as a full current charge is likely to expose the damage and kill off the battery.
There are several things which damage lithium cells.
Heat is one of them, which is why if you're using a laptop that allows it, it's better to run off the mains where possible with the battery out. Of course this isn't always practical and if someone knocks the power lead off goes your laptop. With our phone's it's not an option. Charging also produces heat, the higher the current the hotter it gets, so short top-up charges are better than long charges.
Discharging them too low damages them. The phone should prevent this by stopping you being able to power on the phone if the voltage is too low, however it could be misreading the voltage. Sometimes they can be revived if the voltage hasn't dropped too far below the minimum, with a low current charge, but the damage would have been done so the battery wouldn't last as long as an undamaged one treated the same way and of the same age.
Time. It's a killer. From the moment of manufacture the battery's internal contacts start losing efficiency, giving the result of lower capacity over time. Heat increases this. There's nothing you can really do about it, just remember there's no point buying a spare battery to use in the future when your original one finally stops holding enough charge, by then the spare would have degraded too, so buy replacement batteries when you need them, not before.
xaccers said:
You've fallen for what I mentioned in my second sentance.
A 2A power supply does not only provide 2A, it provides anything up to 2A.
So if your phone only draws 1A, it will only provide 1A.
The phone is the charger, the thing we think of as the charger is actually just a power supply.
Unless someone has the spec sheets for the charging circuit in the phone, we don't know the maximum rate at which it will charge the battery.
One way to find out would be to discharge the battery to a level where the phone won't turn on, then without turning the phone on, set it charging.
Time how long it takes for the LED to turn green.
Divide 1230 by the time in hours that it took and you've got roughly the current drawn to charge it.
Say it takes 90 minutes with a 1A power supply, so that's a maximum charge rate of 800mA, so even if you connected it up to a 5A power supply, it will still only charge at 800mA.
So, you connect it up to your 1A power supply, that means with the phone on you've got a "spare" 200mA to play with.
If the phone isn't using more than 200mA to just "run" itself, then you'll charge a battery in the 90 minutes.
However, say you start your sat nav app, it draws 400mA (guess), the charging circuit drops to use only 600mA, taking longer to charge but allowing you to find where you're driving too.
While you're navigating to a restaurant, you want to phone ahead to confirm the reservation, so you open up Opera and search google with a 3G connection, that takes another 400mA (guess). The charging circuit now only has 200mA to use. Your battery isn't getting much charge.
Imagine using a 600mA power supply instead and you can see how you could get to the situation where despite being plugged in, your battery is running down.
I've used 400mA to demonstrate the impact, of course they real values are lower, otherwise you'd only get an hour's use out of having GPS and 3G enabled. Hmm, then again...
Click to expand...
Click to collapse
Spot on! you really hit it...look at it againas in this analogy, you have a 2mm diameter water pipe and being fed from a 10mm diameter pipe, you cant get into the 2mm more than it could take. and reversing the scenerio, inference could be drawn!
bR
Related
I was curious about car chargers and I heard back in the day that if you use a car charger its actually bad for the battery because the power from the car isn't a constant "flow" is that true? Second question is it bad if you leave your Fuze/Touch Pro plugged charging for over 8 hours a day because im at work Mon-Fri and I just leave it plugged in so I was just curious if it will lessen the life of the battery..? Sorry if its dumb questions just curious
I personally use car charger as my main charger.
i used it also for the Herald and TyTnII... and i didn't feel any battery problem.
however you should pay attention for the charger brand/make.
i advise to have the original HTC one.
sguerra923 said:
... that if you use a car charger its actually bad for the battery because the power from the car isn't a constant "flow" is that true?
Click to expand...
Click to collapse
during the start of the engine, the voltage level may drop and the charger may stop charging, but during the time you drive, there's no problem.
The generator produces about 100 A, so the 500 mA or 1 A current of your changer do not matter
So what if you charge you phone for long periods of time even though battery is fully charged? Any neg effects?
sguerra923 said:
So what if you charge you phone for long periods of time even though battery is fully charged? Any neg effects?
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Click to collapse
It's not good for any battery to do that, but usually you go into trickle mode, which protects the battery (I don't know if the charger or the phone controls that). Over-charging batteries is one of the things that kills them. You can tell on your phone when it's in trickle mode, because the LED around the scroll wheel stops blinking (well, I think that's the notification for trickle mode-could be wrong).
Farmer Ted said:
It's not good for any battery to do that, but usually you go into trickle mode, which protects the battery (I don't know if the charger or the phone controls that).
Click to expand...
Click to collapse
The phone. Otherwise you couldn't charge via USB
I think the "don't charge in your car or you'll damage your battery or phone" is mostly an urban legend. Yes if you buy a crappy USB cig adapter that doesn't provide stable 5v then good luck. That said, even cheap adapters should be able to provide a good 5v source. 5v regulators have been around for ages. I bought them by the dozen 20 years ago when I was a teenager starting to play around with electronics. Even back then, they were less than a buck each if bought in bulk. So stable 5v supplies are not hard to come by. Voltage dips during startup isn't much of a problem either since regulators (even modern switching ones) only requires 10-20% headroom to operate which means as long as you are seeing 6-7v at the cig adapter, you're good. Your car wouldn't even start if it dipped that low. More likely an issue is the voltage spike that might occur right after the engine starts and the alternator kicks in. Most decent regulators will handle those as well. Chances are, you'll blow your adapter before anything damaging goes to your phone.
Recharging batteries requires a "fixed" current source. Modern rechargeable batteries (Li-Ion, Ni-Mh, etc) have charging profiles for optimal charges. That just means they need different currents at different stages of their charge cycle. It became clear pretty quickly that it was better to build the charging circuit into each device which did the best job for the battery it was designed for. That's been the case since the early mid 90s I think. What this means is that pretty much all devices built to be rechargeable (whether the battery is replaceable or not) only requires a simple consistent voltage source. This is why we have the "Universal" chargers today and why they are so cheap. I would still not pay $20 for one though. I'll spend 10 to get the generic brand which is just as good without the brandname on the package. The funny thing is, most of these power supplies come from just a handful of overseas manufacturers so you might be getting exactly the same thing. The only one's I'd avoid are those really cheap ones like the like the ones you might see on ebay. Most of them are actually good but some less reputable sellers might have gotten reject stock form somewhere and is selling them. These units are rejected because they didn't meet voltage/current specs and the person that was supposed to throw them out sells a huge box of them to someone for $50 or some such.
sguerra923 said:
Second question is it bad if you leave your Fuze/Touch Pro plugged charging for over 8 hours a day because im at work Mon-Fri and I just leave it plugged in.
Click to expand...
Click to collapse
Li-On batteries dont really have a problem with charging them from any state to full, no memory really. However if you have a full charge and leave it plugged in you can burn them out in which case they do not retain that charge for very long. It will over periods of time shorten the life of the battery. It usually wont happen on the first go (depending on how long after full you leave it charging.)
Safest way to keep your battery happy is not to let it drain to complete empty and to take it off the charger when its done.
Interesting info guys.. so it looks like on the safe side that im not going to leave it plugged in for long hours..
sguerra923 said:
Interesting info guys.. so it looks like on the safe side that im not going to leave it plugged in for long hours..
Click to expand...
Click to collapse
most modern battery chemistry has a life of around 1000 recharge cycles. It doesn't matter if they are full charges or half charges so even though there isn't a classic memory affect, it does nibble away at the recharge cycles. To put it another way, a given battery loses 1/1000 of it's capacity every time it's charged to full charge. Not really memory but just steady degration. All charging circuits today either stops charging or does trickle charge once full. BTW, trickle is a term that applies mainly to pb and NiCad betteries.. today's batteries actually use a form pulse charging for maintenance. Now this protects the battery from overcharging but if you leave it plugged in, the charging circuit will basically go into this mode of letting the battery drain a bit and then charging it. This will eat away at a batteries life. A real world example... my wife and I had near identical laptops ant one point. She left hers plugged in most of the time whereas I drained my battery each time before recharging. When her battery started lasting only 10mins on a "full" charge, mine was still at about 1.5hrs. It took her battery only a year to fail where mine didn't go dead (i.e. below 1hr per charge) until over 18months.
My advice is don't leave it plugged in but once it's about 20-30% of full it's ok to recharge. Hell, if you think about, 1000 recharges will last almost 3 years of daily charging. So what if it only lasted 2. Any of us would likely be on to the next phone or be willing to buy a second battery.
When I exchanged my Fuze for a new one at AT&T, the service person said my battery was bad, due to overcharging.(Battery had a slight bulge). She said leaving my Fuze plugged into my car charger and my computer(with charging turned on) degraded the battery. Phone was about 7 months old.
There is an option to NOT charge the battery when connected by USB to the computer.(kind of indicates no automatic charging control)
Well, I use my Fuze as a computer 12-14 hours a day. I want to see the screen, which means I need it plugged in either to the computer or car charger.
If I turn off recharging when connected to my computer, I end up with a dead battery pretty quickly, since I use it a lot as my business phone with a Bluetooth speakerphone.
The AT&T person said this information was given to them by HTC.
bigger capacity battery or get another device(netbook) that can sustain the 'abuse'?
bigger capacity battery won't solve it
Without it being plugged in, the screen turns off. Even a large battery wouldn't last with the screen on all the time, if even you could figure out how to make it stay on.
I had to plug in the earphone dongle and plug the car charger in to that, to get the screen to stay on in my car. Plugging the car charger directly into the phone, the screen would turn off no matter what I tried.
I guess I need to replace the battery every 8-12 months.
Yikes, there's so much misinformation about batteries in this thread, it's frightening.
so point us to better info
All I know was that my battery was bulging a bit after 7 months of use, and it was holding a charge less and less.
And I reported what AT&T told me..
hrothnir said:
All I know was that my battery was bulging a bit after 7 months of use, and it was holding a charge less and less.
And I reported what AT&T told me..
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Click to collapse
I'm not saying your battery isn't broken, and I'm not saying your charger (part of the phone nowdays) didn't go haywire and break it. I AM saying, however, that leaving the phone plugged in didn't do it (unless, of course, your charging hardware was faulty, in which case you're screwed anyway).
Lithium-Ion batteries don't get overcharged, because they tend to explode. That's generally considered a no-no for batteries, especially in consumer devices, so the charging hardware is designed to stop charging when the battery is full. An occasional "topping charge" is applied (by some chargers) because of the self-discharge of the cells. I kinda doubt that our phones do that, though, because it's only something like 1h of topping charge once every 20 days.
Let me repeat this again for absolute clarity: lithium-ion chargers STOP CHARGING when the battery is full. Leave it plugged in as long as you want, and (assuming the charging hardware isn't broken) it'll be fine.
So you're saying what AT&T told me was bullsh**t
Not that I believe what AT&T says or the given reasons, which didn't make sense from a technical standpoint.
But then you wonder why there is an option in the Fuze to NOT CHARGE the phone when connected to a computer using USB.
And I did see the bulge, and AT&T did replace the battery under warranty.
But then you wonder why there is an option in the Fuze to NOT CHARGE the phone when connected to a computer using USB.
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Click to collapse
Perhaps that option is available so when your laptop is not plugged into AC power, you can connect your phone without worrying about draining the laptop battery.
laptop
Seriously doubt that option was designed for laptops.
The phone would take very little from a laptop battery.
And would probably be labeled for laptop use.
I think that the phone drops a few % in power, then recharges, and does that constantly while plugged into a computer, causing the battery to waste the 800-1000 recharge cycles that it has.
Be nice if you could set the phone to not recharge when connected to a computer unless the power dropped 25% --or make it configurable.
Manually turning the charging off/on is impracticable.
Maybe a program can/has been written to cycle the charging off/on properly.
Whenever I use my sensation when I get home, I always game on it.
You know games such as dead trigger, It gives me the notification "Power is being used more than charge" or something like that.
I was wondering if there was a charger that charges faster.
I was thinking about getting an external charger,as I have 2 batteries, but please give me your opinions!
Thanks!
I ordered a pair of Anker 1900 batteries that came with a charger that can charge a battery externally as well as charge the phone directly. Any charger capable of providing 1000mAh is enough to provide a full charge; that's all the phone will draw anyway. If you go into settings and power, if it says Charging (AC) and not Charging (USB) you're drawing as much as you can. The travel charger that shipped with the phone will give you the fast charge...
Here's the kit I ordered: http://www.amazon.com/1900mAh-Batte...id=1358461441&sr=1-2&keywords=anker+sensation
owner eod said:
Whenever I use my sensation when I get home, I always game on it.
You know games such as dead trigger, It gives me the notification "Power is being used more than charge" or something like that.
I was wondering if there was a charger that charges faster.
I was thinking about getting an external charger,as I have 2 batteries, but please give me your opinions!
Thanks!
Click to expand...
Click to collapse
If a high powered charger existed then it still wouldn't solve your problem. The reason why you get this notification while playing games is because, in order to prevent a fire, when the Sensation reaches a certain temperature then it will stop charging the battery; if the phone gets too hot then it will not charge.
I have that problem to all i did get new battery look at thread http://forum.xda-developers.com/showthread.php?t=2101362
A high power charger just has the ability to let a larger amperage value through without it melting.
But both a phone charger and a tablet charger are 5 volt devices like all
Smartphones usually have a 1amp charger. Tablets have a 2 amp charger. But both are 5 volts.
You can plug a smartphone into a 2 amp charger easily enough. But the charger can't "push" the extra amp to the phone. That's not how it works. The phone can only "pull" 1 amp. It's the device that regulates how many amps it consumes.
But you could plug your phone directly into a wall socket without a charger and it will send 120 volts to the phone. Of course this will fry the phone pretty quickly (or the phone will register that it's got too much voltage and kill the circuit to protect itself) but assuming that the phone could survive the voltage the battery would then charge very fast.
In other words a higher powered charger won't help charge the phone faster because the phone is regulating how much power it takes from the charger. The phone is set up to only draw 1 amp. Period.
More voltage would charge the device faster but fry the phone. More amperage won't help because the phone won't use it anyway.
I am a bit surprised at how long my shield tablet takes to charge, around 6-8 hours depending on how much battery is left (usually around 20% before I charge).
Is this normal? Or are my expectations a little too high in thinking it would take 2-3 hours to charge?
Many thanks for for answers!!
What charger are you using? Mine doesn't take that long and I'm using NVIIDIA's retail charger (2.1A).
I am using the wall charger that is supplied with the tablet!!
I have spoken with nvidia support about this issue, however they couldn't confirm the charge time for some reason, hence why I am asking here for peoples experience with charging times. Also I have tried googling the answer and haven't found anything!!
Slightly frustrating!!
43 views so far and no answer?
come on people, all I am asking is your charge times for your shield tablets!
pretty please with cream and a cherry on top?
I havn't any exact number for how long the charging take, but I think the charging time has increased with Lollipop. Most of the time it is fully charged over night (6-8 hours) but sometimes it has just charged a few percent.
I have seen some unfortunate charging times as well, but I haven't recorded them or taken note of exactly how long they take. I also have chargers up to 2.1A and thicker gold plated cables I've tried.
Are there any apps I can use to record battery percentage by the minute?
ACharLuk said:
What charger are you using? Mine doesn't take that long and I'm using NVIIDIA's retail charger (2.1A).
Click to expand...
Click to collapse
What are we talking about? Time to go to 100% battery or time to go to green led?
There is a 30-45 min time difference between 100% and green led.
When my shield reaches around 20% i'll charge it over night whilst I'm asleep, 6-7 hours later when i wake up i still see the orange led and am surprised at how slow it takes to get to 100%. This is how I noticed the slow recharge time.
Admittedly this is my first tablet, and as stated I'm just surprised and lead me to think maybe the charger that was provided is a dud and/or the tablet is a dud. And no one likes a dud!!
However I just wanted to hear other peoples experiences as maybe the charge time is this long and I've just got too high of an expectation that a device like this should have a charge time of 2-3 hours.
Many thanks for all the responses so far, most appreciated. Keep 'em coming!! :good:
If you want 2 - 3 hours of charging time starting from 15% or 20, you have to get another charger. The stock one is weak. I got a Samsung Note 3 one and after 2 hours and a half, or even less depending the percentage, it's fully charged.
CM17X said:
If you want 2 - 3 hours of charging time starting from 15% or 20, you have to get another charger. The stock one is weak. I got a Samsung Note 3 one and after 2 hours and a half, or even less depending the percentage, it's fully charged.
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Click to collapse
^^^This.
Also, I have a Quick Charge 2.0 charger that I found on Amazon that shows whether or not a device is capable of using the Quick Charge 2.0 standard. My nVidia Shield does, in fact, seem to support it, and charges pretty quickly on this charger. I can't say I've ever had the tablet get below 50% or so, but I've never seen it take more than an hour or two to get the Shield's charge indicator to go green with that charger.
jt3 said:
^^^This.
Also, I have a Quick Charge 2.0 charger that I found on Amazon that shows whether or not a device is capable of using the Quick Charge 2.0 standard. My nVidia Shield does, in fact, seem to support it, and charges pretty quickly on this charger. I can't say I've ever had the tablet get below 50% or so, but I've never seen it take more than an hour or two to get the Shield's charge indicator to go green with that charger.
Click to expand...
Click to collapse
What's the Output of yours?
CM17X said:
What's the Output of yours?
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Click to collapse
18W. However, in the normal 5V mode, it's only 10W, like any other 2A charger.
In QuickCharge 2.0, the device being charged decides if/when the charger uses the 5V, 9V, and/or 12V charging modes. If the device is not QC 2.0 compatible, the charger will ALWAYS charge at 5V. This particular charger indicates when the device has allowed it to shift into the 9V or 12V charging modes (but unfortunately doesn't indicate which). In either of those modes, it's 18W (which incidentally is about 4W more than the Moto "Turbo Charger").
I've seen a 30W charger on Amazon (which is the maximum, according to the standard), but it doesn't have the indicator. This is important to me, because QC 2.0 needs a full data cable to communicate with the device. Accidentally use a charge-only cable, and it will stay in 5V mode. It's nice to have that warning that you've done something wrong.
However, in this case... that indicator showed me that my Shield had a fantastic unadvertised feature (at least as far as I knew).
jt3 said:
18W. However, in the normal 5V mode, it's only 10W, like any other 2A charger.
In QuickCharge 2.0, the device being charged decides if/when the charger uses the 5V, 9V, and/or 12V charging modes. If the device is not QC 2.0 compatible, the charger will ALWAYS charge at 5V. This particular charger indicates when the device has allowed it to shift into the 9V or 12V charging modes (but unfortunately doesn't indicate which). In either of those modes, it's 18W (which incidentally is about 4W more than the Moto "Turbo Charger").
I've seen a 30W charger on Amazon (which is the maximum, according to the standard), but it doesn't have the indicator. This is important to me, because QC 2.0 needs a full data cable to communicate with the device. Accidentally use a charge-only cable, and it will stay in 5V mode. It's nice to have that warning that you've done something wrong.
However, in this case... that indicator showed me that my Shield had a fantastic unadvertised feature (at least as far as I knew).
Click to expand...
Click to collapse
So no more words, i'm getting that charger.
Ps: Negative charge while playing, do you face it? It happens on games like HL2 and Sky Gamblers - Storm Raiders.
kf006 said:
When my shield reaches around 20% i'll charge it over night whilst I'm asleep, 6-7 hours later when i wake up i still see the orange led and am surprised at how slow it takes to get to 100%. This is how I noticed the slow recharge time.
Admittedly this is my first tablet, and as stated I'm just surprised and lead me to think maybe the charger that was provided is a dud and/or the tablet is a dud. And no one likes a dud!!
However I just wanted to hear other peoples experiences as maybe the charge time is this long and I've just got too high of an expectation that a device like this should have a charge time of 2-3 hours.
Many thanks for all the responses so far, most appreciated. Keep 'em coming!! :good:
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Seems you have a problem, mine doesn't take more than 4:30 to go from 15% to green light.
Actually, using the stock charger, it only takes mine about 3 hours to fully charge from being dead.
derekmt95 said:
Actually, using the stock charger, it only takes mine about 3 hours to fully charge from being dead.
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I don't think so
Correct me if i'm wrong but the shield battery is 6900mAh.Stock charger is 2.1A... So what you are saying is impossible.
Doesn't charging a battery faster degrades it? Like, the faster you charge it the hotter it gets and the fastest it degrades overtime? And the same can be said of the opposite: the slower the better for the battery longevity?
Judge584 said:
I don't think so
Correct me if i'm wrong but the shield battery is 6900mAh.Stock charger is 2.1A... So what you are saying is impossible.
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You're wrong, it's a 5197 mAh. Stock charger is 2.1A. Battery charge take 4 hours near to 5%, 3 hours near to 15%.
eurominican said:
Doesn't charging a battery faster degrades it? Like, the faster you charge it the hotter it gets and the fastest it degrades overtime? And the same can be said of the opposite: the slower the better for the battery longevity?
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Yeah, high amperage kill your battery faster, take care about "quick recharge" charger. Try to avoid long charge too. Don't forget : 1 cycle on Lion-ion battery don't mean 1 charge = 1 cycle. 1 cycle = 0% to 100%. So you can charge 20 percents at job, 10 percents in train, 70 percents at home.
---------- Post added at 03:33 PM ---------- Previous post was at 03:30 PM ----------
kf006 said:
I am a bit surprised at how long my shield tablet takes to charge, around 6-8 hours depending on how much battery is left (usually around 20% before I charge).
Is this normal? Or are my expectations a little too high in thinking it would take 2-3 hours to charge?
Many thanks for for answers!!
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See my post just up there. 6-8 hours is too long, maybe battery fail...
Thanks for all the replies guys, most appreciated!!
I have spoken to Nvidia Customer Care and I thought I would share what they advised me to try (which may or may not help others are experiencing the same issue), not sure if this will work or not, but at least it is something to try -
"We would kindly request you to follow the battery calibration producer mentioned in the steps below, observe the device performance and let us know the result.
You will have to calibrate the battery for just one time and observe the device battery backup for 2-3days to see the changes.
1: Drain your Shield tablet battery by using it normally until it turns off by itself.
2: Power-on your Shield tablet, if it wakes up and if you see some power left, follow step 1.
3: If Shield tablet is now drained to the point it can't wake up, set the device to charge for 7-8 hours.
The device should remain off when you set it for charging here.
4: Unplug the charger after 7-8hours, power on and wait for the battery charge to drop down to 90-95%.
5: Once the device battery drops down to 90-95%, plug in the charger and charge for one complete hour.
6: Unplug the charger once the device is fully charged.
7: Go to Shield settings > Shield power control > Apps> select optimize all option.
8: Go to Shield settings > Shield power control > system>
• Set the brightness to auto.
• Change the sleep option to 2 minutes of inactivity instead of default 10 minutes inactivity.
• Change the processor mode to either optimized or Battery savings.
• Check the Wifi optimization on.
Observe the device performance and report to us if you are still facing issue with the battery backup.
For better battery backup and optimization, you may also consider following steps.
1: Always use the Shield tablet charger and not the computer USB ports or any other charger as the power specifications vary from the device to device.
2: In case if the charger is missing, use the back port of the desktop computer to charge the device instead of front port.
3: Always remember to exit the application instead of tapping the home button which will continue to run the application in the background.
4: Restart your Shield tablet at least once in a week. This will refresh the device making it work faster and efficient.
5: Connect the charger only when the battery comes down to 15% and unplug the charger only when it reaches 90% or above. This will reduce the number of charge cycles which will make battery last longer.
6: Use a third party app manager like Clean Master and free the memory at-least once a day to keep the device running faster. "
Fingers crossed this helps.
Your charger is faulty I believe, same as mine which Amazon and Nvidia themselves said was faulty and I got a partial refund due to that. I would suggest you to get some other charger, that charges at like 2.1A as they charge the tablet ridicolously fast (about 2,5 hours from 20%) and I'm finally able to play games while charging too (however, then it charges at a slower rate).
I made a thread about this not so long ago:
http://forum.xda-developers.com/shi...k-charger-charges-slow-drops-battery-t2972368
First of all . Every night when I go to bed, I like to plug my phone in and charge it while I sleep.
6-7 hrs or so.
Is there a way to stop this fast charge feature , or turn it off. It's a cool addition, however I feel I'm doing more harm leaving it plugged in all night??
Could I just use my old blackberry charger block instead?
markdexter said:
First of all . Every night when I go to bed, I like to plug my phone in and charge it while I sleep.
6-7 hrs or so.
Is there a way to stop this fast charge feature , or turn it off. It's a cool addition, however I feel I'm doing more harm leaving it plugged in all night??
Could I just use my old blackberry charger block instead?
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Technically , yes you can use any charger you'd like. You don't have to stick with the fast charger. I will though , highlight that the fast charger is optimized for the S6 battery and the battery is optimized for it , so there is no harm in keeping the charger plugged in.
You can't damage the battery if you leave it on all night. All phones have special circuitry to stop charging once the battery is full.
Fast charge works by increasing the voltage, not the current. This is a much safer approach for increasing the power transfer from charger to phone. As it is primarily the amperage that increases thermal output etc.
Although the phone will get warm initially while charging, all phones will. But when the battery reaches full capacity, the battery circuit actually says "okie dokie. I've got what I need now. Let's just trickle charge to keep me full till my boss is ready" and hardly any power will flow through, and the temperature will drop.
Actually makes me wonder about setting up a temp/time monitor while charging to see exactly what happens and when now :3
But as others have said, both charger and battery are optimised for it, and it is plenty safe enough. It's what I do!
There is also nothing stopping you using any other (safe and preferably branded) 5v 1A charger. It will just charge slower. Much like what you are already used to. 3-4 hours instead of 1-1.5ish hours.
solitarymonkey said:
Fast charge works by increasing the voltage, not the current.
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Forgive me, I dropped my electrical engineering major, but when we're dealing with direct current, doesn't increasing the voltage by definition increase the current if the resistance doesn't change?
I used the Ampere app to compare the regular charger, from which the phone pulled around a half of an amp, with the fast charger, from which the phone pulled a full amp.
Sallyty said:
Battery life depends on the number of repeated charge and discharge, so should avoid charging the battery is more than power, it will shorten the battery life.
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I'm not really sure what you mean by " so should avoid charging the battery is more than power", but battery lifespan in lithium batteries is decreased by FULL discharges and recharges. The best possible routine for making lithium batteries last is to charge early and often. And as genetichazzard pointed out, there is circuitry included that stops the charging (or trickles it) once it reaches full charge.
"Rapid charging", in general, will cost you life in batteries, but that is usually in reference to 4A-6A rapid charging, where this new Samsung charger still does not exceed 2A. I trust their battery engineers. They've one of two things: they have either engineered the batteries and chargers to last in their first sealed body phone, or they are trying to screw us by making a battery/charging system that will force us to pay for a costly battery replacement. They won't stay in business much longer if they go the second route.
flu13 said:
Forgive me, I dropped my electrical engineering major, but when we're dealing with direct current, doesn't increasing the voltage by definition increase the current if the resistance doesn't change?
I used the Ampere app to compare the regular charger, from which the phone pulled around a half of an amp, with the fast charger, from which the phone pulled a full amp.
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Click to collapse
I have no idea of the complexities in the technology, or how the phone itself deals with the current from the charger. But I looked at the fast charger that came with my s6 last night, and it is rated like this;
9V 1.67A
5V 2A
The 9V output provides a 15W of power, whereas the the 5V output provides 10W of power.
And after a little bit of reading (can't site my source now as I forgot the website), it is the current that generates heat in the components (such as wires).
So by upping the voltage, the charger is able to transfer more energy to the phone safer than if manufacturers continued to just increase the current.
There will be a smart switching method of some sort within the charger to go from the 5V circuit to the 9V circuit, with a slightly higher resistance to drop the current.
And before I ramble on without making much sense, that is what I have learnt
---------- Post added at 02:05 PM ---------- Previous post was at 01:51 PM ----------
Sallyty said:
I think you are right,Maybe phones have special circuitry to stop charging once the battery is full.
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You are right. Chargers and rechargeable batteries as a whole have been getting "more intelligent" over recent years.
No idea exactly how they do it, I know that a lot of batteries have chips in the that monitor things such as charge capacity and its "health". So I am assuming that they have some form of circuit switch to a higher resistance circuit when the battery is full, so that only a very tiny current can flow, keeping the battery full, without killing it.
solitarymonkey said:
No idea exactly how they do it, I know that a lot of batteries have chips in the that monitor things such as charge capacity and its "health". So I am assuming that they have some form of circuit switch to a higher resistance circuit when the battery is full, so that only a very tiny current can flow, keeping the battery full, without killing it.
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Almost always, the circuit is built into the charging device, not the battery. In the case of phone batteries, the phone is the charging device.
Link to more than any non battery engineer needs to know about lithium-ion batteries and charging.
DevonSloan said:
Almost always, the circuit is built into the charging device, not the battery. In the case of phone batteries, the phone is the charging device.
Link to more than any non battery engineer needs to know about lithium-ion batteries and charging.
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Thanks for the link/info. A while after I said all that, I started thinking that it can't be right.
The phone does the regulation, but I'm pretty they (the batteries) do have an integrated chip for health stuff.
Cheers again for the correction!
Hey guys,
I was looking for some clarification on this topic.
So I heard on a youtube video (can't remember which, for the life of me, I just know it was an S8 video) that Wireless Charging has a better impact on battery in the long run.
They had stated that the battery would continue to hold a better charge over time, where as, if you used wired charging, the amount of charge the battery can hold over time would be much less to when you first got it.
Now I do know that battery gets worse over time, however, I have never heard anything about how wireless charging can increase the longitivtiy of the battery.
Maybe someone on here might have more information on this?
I will try to find that youtube video but if this is the case, then I will definitely need to get a wireless charger.
Regards
Unless this youtuber tested 2 phones for a year, charging one with a cable and another with wireless charging i wouldn't listen to what they're saying.
peachpuff said:
Unless this youtuber tested 2 phones for a year, charging one with a cable and another with wireless charging i wouldn't listen to what they're saying.
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Yeah I agree. A believe a charge cycle is the same regardless of how it is being charged.
Would never think wired charging puts more stress on battery life.
I think though that with wireless charging once the phone is fully charged the pad cuts out so it won't over charge
With a wired connection when the phone is charged its still consistently trying to charge which can end up damage battering the long term
craigels said:
I think though that with wireless charging once the phone is fully charged the pad cuts out so it won't over charge
With a wired connection when the phone is charged its still consistently trying to charge which can end up damage battering the long term
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This is also what I have been wondering. If this is true then I may get a nice wireless pad for charging overnight (maybe the new official samsung "convertible" one but its damn expensive). I would have thought that the phone itself knows when a battery is charged and stops drawing the current from the cable though, so it would make no difference either way if that is true (but perhaps its not?).
But I did hear the exact opposite to op, that wireless charging was worse for the batteries, possibly due to the heat generated. But I don't know how true that is.
True
It's better for the battery because it charges it more slowly than a direct wired connection. There is no more heat buildup than using a wired charger, in fact likely less since the charging rate is lower.
As for the other comment that a wired charger doesn't shut off but keeps charging once the battery is full is patently false. The charging circuits whether wired or wireless are quite intelligent and gradually ramp down the charging current as the battery approaches capacity, ultimately delivering just enough current to keep the phone running. In a closed system the energy has to go somewhere and if the charger didn't do this you'd have 18W of power being dissipated as heat and a serious problem on your hands.
craigdamey said:
It's better for the battery because it charges it more slowly than a direct wired connection. There is no more heat buildup than using a wired charger, in fact likely less since the charging rate is lower.
As for the other comment that a wired charger doesn't shut off but keeps charging once the battery is full is patently false. The charging circuits whether wired or wireless are quite intelligent and gradually ramp down the charging current as the battery approaches capacity, ultimately delivering just enough current to keep the phone running. In a closed system the energy has to go somewhere and if the charger didn't do this you'd have 18W of power being dissipated as heat and a serious problem on your hands.
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For wireless I believe the heat generated is more, it is about the method of delivering the power, not the speed. The induction used to transfer power wirelessly is obviously going to be far less efficient and will generate more heat to get even a slower transfer rate then getting the power straight down a cable (but if someone knows otherwise then feel free to correct me). But then I guess the slower charging rate might also put less stress on the battery which is probably good.
For the wired, what you are basically saying is that leaving a phone plugged in to a wired charger will not harm it since the current will have been reduced in the same way a car battery charger might reduce it to a "maintenance" mode once it is fully charged. So people are believing the old myths that you can overcharge a phone, which would seem to be impossible (although I do wonder why they keep slapping up notifications saying things like "FULLY CHARGED! UNPLUG CABLE!" as if leaving it plugged in would in some way damage it!).
Just saw this which explains the overcharging possibility (or lack of)
http://www.androidauthority.com/leave-phone-plugged-overnight-703078/
ewokuk said:
For wireless I believe the heat generated is more, it is about the method of delivering the power, not the speed. [/url]
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The coils themselves don't generate a significant amount of heat, it's the battery itself that causes the phone to get hot. Slower charging means less heat, which is better for your battery so wireless charging will increase your battery life. As the article notes it is also best to keep your phone above 40% charge, partly because fast chargers slow down significantly after 50% to save the battery. That initial burst from 0-50% is done to save you from a dying battery but it takes its toll.
Also note that the S8/S8+ have new battery technology that provides much improved battery life. They're saying 5% loss of capacity after two years compared to 20% for previous generations.
As a bonus not continuously plugging/unplugging a cable from your USB port will make that last longer too. I hardly ever plug my S7 Edge into a physical cable, and I know quite a few people who have killed their USB ports and can no longer charge and or transfer data from them.
craigdamey said:
The coils themselves don't generate a significant amount of heat, it's the battery itself that causes the phone to get hot. Slower charging means less heat, which is better for your battery so wireless charging will increase your battery life. As the article notes it is also best to keep your phone above 40% charge, partly because fast chargers slow down significantly after 50% to save the battery. That initial burst from 0-50% is done to save you from a dying battery but it takes its toll.
Also note that the S8/S8+ have new battery technology that provides much improved battery life. They're saying 5% loss of capacity after two years compared to 20% for previous generations.
As a bonus not continuously plugging/unplugging a cable from your USB port will make that last longer too. I hardly ever plug my S7 Edge into a physical cable, and I know quite a few people who have killed their USB ports and can no longer charge and or transfer data from them.
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Yeah I am torn at the moment between using cable and getting a wireless charger. I like my stuff charged asap but that's partly because i never leave it plugged in overnight and want it charged before bed (which I now know is not a problem anyway) and partly because i want to be able to unplug it to use it if i get a message or email, which isn't an issue with wireless as I can just pick it up and put it back on there after. I assume taking it off the charging pad and putting it back on will not have any detrimental effects to the battery. I am just trying to weigh up the pros and cons of each. All things considered I am leaning towards wireless, particularly if it isn't worse for the battery (although lets face it the difference in degradation between wireless and wired, is going to be so small it's probably not even noticeable after a couple of years by which time I would have a new phone anyway). I wonder if there is a better wireless charger which will be more future proof than the new convertible samsung one (in case I ditch samsung in future) and still give max speed, I would like one that is tilted so I can see the screen though.
My s5 is 3 years old and has only ever been charged by the massive double width "micro USB" cable which takes some force to get in and out of the socket. Still works perfectly though. Never had any usb port of any kind on any device fail, no idea what these other people are doing to kill them!
ewokuk said:
Yeah I am torn at the moment between using cable and getting a wireless charger.
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Having the dock by my bed is very convenient. Just place it on at night and pick it up during the morning. If I need to grab it for anything I can without getting tangled up in wires and it even sits at the right angle so that the always on display becomes my nightstand clock/alarm clock. Once you've gone wireless you won't go back.
craigdamey said:
Having the dock by my bed is very convenient. Just place it on at night and pick it up during the morning. If I need to grab it for anything I can without getting tangled up in wires and it even sits at the right angle so that the always on display becomes my nightstand clock/alarm clock. Once you've gone wireless you won't go back.
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I always turn my phone off at night anyway so I don't get disturbed by some spam message or something (I know I can probably set it up to be silent at certain times, but then why leave it on at all, using the battery for nothing). £70 for that Samsung charger though!! I know there are much cheaper ones but I am not sure they will charge at the same rate, the new samsung one charges faster than any previous wireless charger AFAIK and I would want one where the phone can sit up, and most are just flat. Hmmmm although the do have it for £50 on amazon sold by "fonejoy", still steep though.
This one looks good https://www.amazon.co.uk/CHOETECH-W...=UTF8&qid=1492192247&sr=1-9&keywords=choetech but not sure if itll charge at the same speed as the new samsung one and doesnt use a USB-C connector which probably rules it out. May as well just get the samsung one.
I use the US version of this and it works fine. https://www.amazon.co.uk/d/Mobile-P...d=1492192742&sr=1-5&keywords=rav+power+qc+2.0. The Fast Charging Dock comes with a cable so that should be all you need.
And yes, I have my Do Not Disturb settings to suppress notifications 10:30PM to 6:30AM. Wife complained she couldn't sleep with all that noise going on
craigdamey said:
I use the US version of this and it works fine. https://www.amazon.co.uk/d/Mobile-P...d=1492192742&sr=1-5&keywords=rav+power+qc+2.0. The Fast Charging Dock comes with a cable so that should be all you need.
And yes, I have my Do Not Disturb settings to suppress notifications 10:30PM to 6:30AM. Wife complained she couldn't sleep with all that noise going on
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Thats a wall charger? I'm talking about the charging pad itself. I believe the new Samsung one outputs 15w so is faster than any previous ones which are all 10w I think.
ewokuk said:
Thats a wall charger? I'm talking about the charging pad itself. I believe the new Samsung one outputs 15w so is faster than any previous ones which are all 10w I think.
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There are only two types of charging dock, standard and fast-charge. None of them output 15W to the phone. The expensive Samsung is just a fancy fast-charge dock so it will charge at the same rate as the Seneo and others that support fast-charge. The Samsung fast-charge adapter only provides a maximum output power of 15W (9V @ 1.67A) so it would require 100% transfer efficiency to charge the phone at that power, and in reality it's only about 65% so at most you'll see 10W versus standard Qi charging at around 7W.
All of the Seneo chargers I have coupled with RavPower or Samsung Fast-Charge adapters charge at the same rate (10W to begin with tapering off to 7W above 50% charge).
craigdamey said:
There are only two types of charging dock, standard and fast-charge. None of them output 15W to the phone. The expensive Samsung is just a fancy fast-charge dock so it will charge at the same rate as the Seneo and others that support fast-charge. The Samsung fast-charge adapter only provides a maximum output power of 15W (9V @ 1.67A) so it would require 100% transfer efficiency to charge the phone at that power, and in reality it's only about 65% so at most you'll see 10W versus standard Qi charging at around 7W.
All of the Seneo chargers I have coupled with RavPower or Samsung Fast-Charge adapters charge at the same rate (10W to begin with tapering off to 7W above 50% charge).
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Ahh ok, I will have to check out a few seneo pads.
If your using fast charging AKA Adaptive charging it shouldn't matter either way. The Fast charging port on the phone, and the wireless charging should go through the phone and the phone should automatically stop all charging going to the battery. This is the reason why if you were to leave your fast charger on all night whether it be Wireless or wired, you can pick your phone up at 99% or 98% instead of 100%. The phone stopped charging, then when it drops to a certain % it starts to charge up again.
As far as which is actually best for strain, it shouldnt matter because afaik to the battery its the all the same. Wireless charging just has some coils almost that send the charge wirelessly, but it still goes to the same place.
This is what I have read from google, so I am no expert on the subject, but it seemed pretty legit, and makes sense to me, a person with a Tech background. If anyone knows better please be my guest.
I'm going with wireless charging pads at home but a magnetic cable for in the car.
Not found a good car holder that has the wireless pad built in so I will stick with my ibolt for a bit longer
Sent from my SM-G935F using Tapatalk
There is no correct answer to this question. Battery life is function of many things -
1. Every battery has specified charge cycle. One full charge from min to max is 1 cycle. Two full charge from mid to max is also 1 cycle. So the more you use your device, charge cycles will come to an end more quickly. For example if you use two similar spec phones; first one you use heavily requiring full cycle charge everyday vs second which you use less and requires full charge every alternate day (or to phrase in other way, first is almost completely discharged by evening, second is half discharged). So the theory goes that second phone battery will last double the time than first.
2. Every battery articles you read, you will find recommendation to charge battery in specified current or usually slow charging. Today's battery technology should be immune to this but I still turn fast charging off. It is likely that not all the batteries are immune.
3. Heat is bad for battery. Some wireless chargers heat up. The TYLT VU that I use get uncomfortably warm when I place phone vertically (possibly coils do not align and multiple of them gets activated). Heat build up is there during fast charging too. If you play CPU intensive games and charge at the same time, phone gets warm. All this heat is working negative to the life span of battery.
4. Lithium ion batteries have less chemical stress when they are not fully charged or fully discharged. If you research you will find articles telling one to keep battery between 40% to 90%. Hence I usually do not charge to 100% and if I do, I watch or play games to bring battery level down. Search for best charge level to store lithium ion batteries, I think it is from 45% to 50%. This I guess keeps batteries at the least chemical stress state. So do your maths if you are type who likes to keep battery at 100% charge at all the times.
As you can see there is no straight answer to this question. Battery life is function of all these factors.
Added: I didn't read full article but you can check this link which speaks about impact of heat and leaving battery to full charge state.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Thanks for everyones input on this!
By the way, not sure if it has been mentioned, but this is a pretty cool read:
http://www.androidpolice.com/2017/0...ill-degrade-less-quickly-than-the-galaxy-s7s/
So looks like the S8 won't deteriorate as much over time!
I got the OEM samsung convertible fast charging pad but it doesn't come with a wall plug as I read somewhere (I guess thats just us in the UK getting screwed over yet again). The manual says "Use only Samsung-approved chargers that support fast charging (9v/1.67A, 9v/2A, 12v/2.1A).". So I need a wall plug that will be able to provide the fastest charging speeds from it (which I am guessing is one that does 12v/2.1A??). I dont think all the standard plugs with 2.4a sockets are going to do it right? The "30w" RAVpower one that craigdamey linked says it can do 12v/2A but only for QC3.0 (which I obviously wont get since its just being plugged straight into the charging pad), otherwise its 5v/2.4a. Not sure what one to get now. Theres an Anker 24w one but that says 2.4a per port (I know little about electrics and how these things work!).