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?
Click to expand...
Click to collapse
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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Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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!
Related
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
i have bought tablet few days ago and i got usb charger with it (i mean a charger with usb port at end)
that charger have output of 5v and 2000ma
stock samsung charger have output of 5v and 700ma so i thought that if i can use that charger maybe it will help to charge my phone very fast as it have output of 2000ma.
can i use that charger with my galaxy r? can it damage to my phone or it's battery?
xlm13x said:
i have bought tablet few days ago and i got usb charger with it (i mean a charger with usb port at end)
that charger have output of 5v and 2000ma
stock samsung charger have output of 5v and 700ma so i thought that if i can use that charger maybe it will help to charge my phone very fast as it have output of 2000ma.
can i use that charger with my galaxy r? can it damage to my phone or it's battery?
Click to expand...
Click to collapse
It would not be recommended as it may actually damage the battery or even the charging circuit which charges the battery in your R if it can't withstand the higher rate of charging.
'cooleagle' said:
It would not be recommended as it may actually damage the battery or even the charging circuit which charges the battery in your R if it can't withstand the higher rate of charging.
Click to expand...
Click to collapse
thanks, i will stay away from that tab charger don't wanna damage my phone
A higher amp output should be ok.
A higher voltage is the one you should be worried about.
s4sixty said:
A higher amp output should be ok.
A higher voltage is the one you should be worried about.
Click to expand...
Click to collapse
But cooleagle said maybe it can damage battery and/or charging circuit
Sent from my GT-I9103 using XDA
Simple Guidelines When Buying a Charger
Use the correct charger for battery chemistry. Most chargers serve one chemistry only.
The battery voltage must agree with the charger. Do not charge if different.
Within reasons, the Ah rating of a battery can be higher or lower than specified. A larger battery will take longer to charge than a smaller one and vice versa.
The higher the amperage of the charger, the shorter the charge time will be. There are limitations as to how fast a battery can be charged.
Accurate charge termination and correct trickle charge prolong battery life.
When fully saturated, a lead acid charger should switch to a lower voltage; a nickel-based charger should have a trickle charge NiMH; a Li-ion charger provides no trickle charge.
Chargers should have a temperature override to end charge on a malfunctioning battery.
Observe the temperature of the charger and battery. Lead acid batteries stay cool during charge; nickel-based batteries elevate the temperature towards the end of charge and should cool down after charge; Li-ion batteries should stay cool throughout charge.
Souce : http://batteryuniversity.com/learn/article/all_about_chargers
One more reason why we should be extremely cautious when using other chargers is that when using the charger provided by Samsung I have observed that the charger cuts off the supply to the battery when the battery reaches 100 %.
It may not be the same when using other chargers which will lead to over charging the battery. This continuous over charging can reduce the life of the battery.
Lastly you can experiment as much as you want ( BTW that's why most people are on this forum ) its your decision, but see to it that you are not damaging the battery or the handset in the process.
Its not the charger that cuts off power supply to the phone.
It's the memory chip inside the battery that supplies information to initiate the cut off.
That is why it's highly recommended to use original batteries in ur phone so that the phone will not burst into flames !!!
A Smart Charger, on the other hand, has a built in circuitry that does the cutting off and after that continues to trickle charger the batteries to maintain the charge on the batteries. U can usually see this for car chargers.
These chargers cost way more than ur average Samsung charger.
Cheers !
thanks for guys for giving your valuable opinions
today i thought i should give it a try
i used stock micro usb to usb cable to connect with that charger and plugged in but something weird happened
when i plugged in charger screen lights up with with notification tone as usual but touch screen stopped responding
both touch screen and touch sensitive buttons stopped working only home button was working after removing that charger all things started to work again normally really strange
xlm13x said:
when i plugged in charger screen lights up with with notification tone as usual but touch screen stopped responding
both touch screen and touch sensitive buttons stopped working only home button was working after removing that charger all things started to work again normally really strange
Click to expand...
Click to collapse
Don't use that one again buddy !
'cooleagle' said:
Don't use that one again buddy !
Click to expand...
Click to collapse
yeah for sure i love my phone
Hello Guys!
I got today a new P3110 and I discacharged it to 2% and I plugged it now to load.
I have seen the charger pushes 2A @ 5V , this is pretty much for a battery of 4Ah, I know from my batteries ( AA AAA and others) that the charging current should be max. 1/3 of the capacity of battery.
So my question is: IS it better to charge it with the Samsung Galaxy S2 charger which provides only 0,[email protected],1V ?
It would last app. 6h to charge it till its full ( can be done over night, hopefully the charger wont melt)....
What do you think about that? Woul it harm to battery(li poly) to do it with small current?
cheers
If the charger seems much then tell me why Samsung made it.
Luigi2012SM64DS said:
If the charger seems much then tell me why Samsung made it.
Click to expand...
Click to collapse
to destroy the battery faster, through much more currency than actually needed, so you have to buy a new one....
sh0ne said:
to destroy the battery faster, through much more currency than actually needed, so you have to buy a new one....
Click to expand...
Click to collapse
You have got to be kidding me. ITS SO THE TAB CHARGES FASTER. IT WON'T KILL THE BATTERY!!!!
Its because the tab has a much bigger battery 4000mah vs 16xxmah.
It charges it faster
MrAndroid12 said:
Its because the tab has a much bigger battery 4000mah vs 16xxmah.
It charges it faster
Click to expand...
Click to collapse
Of couse it charges faster, but for long therm it will kill the battery faster. Its usual, like every battery. Every fast charger is not good for battery, I just wanted to know if somebody have a expieriance...
sh0ne said:
Of couse it charges faster, but for long therm it will kill the battery faster. Its usual, like every battery. Every fast charger is not good for battery, I just wanted to know if somebody have a expieriance...
Click to expand...
Click to collapse
Battery life span is a matter of charge cycles 0%-100%-0%. That is 1 cycle and surely batteries don't discharge to 0% not charge fully to 100%
-AFAIK- Even with lithium, Its the heat build up when "fast" charging that shortens any battery life - (same with fast discharging- I would never use those apps that do so) , so I agree with shOne. I have the same model & have noticed the battery does get quite hot when mains charging,( though have never thought to check charging AH).
I would imagine that the only damage you would do with using phone charger would be to the charger, by sucking out more than it can handle, not the battery ! -
-- But why not charge it via a pc usb port - this take a lot longer (so presume much lower AH) than the mains plug in charger - Most usb pc ports are nowadays - permanently live, even when pc off - same with the usb on a modern sky/virgin box. My battery does not get hot, charging this way. I dont know what the charge rate is charging this way ,because both the inbuilt notification & my battery app say "discharging" - (although actually charging)
(I agree that Samsung have provided a quick mains charger, and wouldnt be averse to selling replacement batteries earlier than would otherwise be neccessary, !! (I wouldnt use cheap replacement batteries in any I.T. stuff - I "blew up " a laptop once as a result!!)
I believe that the 2 amp charge is reasonable with the out put of most lithium batteries for this type of device. Since it is a lithium it will not be overcharging or over heating due to sensing, it would be a serious fire hazard... fyi I use a2 amp charger from Wal-Mart and I do not notice my device really heating up...
Sent from my GT-P3110 using xda app-developers app
Buff52 said:
-AFAIK- Even with lithium, Its the heat build up when "fast" charging that shortens any battery life - (same with fast discharging- I would never use those apps that do so) , so I agree with shOne. I have the same model & have noticed the battery does get quite hot when mains charging,( though have never thought to check charging AH).
I would imagine that the only damage you would do with using phone charger would be to the charger, by sucking out more than it can handle, not the battery ! -
-- But why not charge it via a pc usb port - this take a lot longer (so presume much lower AH) than the mains plug in charger - Most usb pc ports are nowadays - permanently live, even when pc off - same with the usb on a modern sky/virgin box. My battery does not get hot, charging this way. I dont know what the charge rate is charging this way ,because both the inbuilt notification & my battery app say "discharging" - (although actually charging)
(I agree that Samsung have provided a quick mains charger, and wouldnt be averse to selling replacement batteries earlier than would otherwise be neccessary, !! (I wouldnt use cheap replacement batteries in any I.T. stuff - I "blew up " a laptop once as a result!!)
Click to expand...
Click to collapse
Agreed. The worst I got was a cheap replacement off a street without a packaging for a dollar. When I plugged it in for a few minutes the battery turned extremely hit and the battery expanded as if it was a puffer fish that took an electric shock
"Agreed. The worst I got was a cheap replacement off a street without a packaging for a dollar. When I plugged it in for a few minutes the battery turned extremely hit and the battery expanded as if it was a puffer fish that took an electric shock"
--------
LOL.........mine was a supposed "genuine" DELL replacement battery I got on EB from HK. On the first charge (in the bedroom) heard a strange hissing then a loud "pop". Some of the underside casing was actually melted and there was battery gunge all over the internals!
Buff52 said:
"Agreed. The worst I got was a cheap replacement off a street without a packaging for a dollar. When I plugged it in for a few minutes the battery turned extremely hit and the battery expanded as if it was a puffer fish that took an electric shock"
--------
LOL.........mine was a supposed "genuine" DELL replacement battery I got on EB from HK. On the first charge (in the bedroom) heard a strange hissing then a loud "pop". Some of the underside casing was actually melted and there was battery gunge all over the internals!
Click to expand...
Click to collapse
A lot of things I bought from Hong Kong off Ebay actually came from mainland China pfff.....
It's those low quality defects they send you. Mass market goods in china doesn't require quality passes unlike Hong Kong where it's illegal once they get pass customs.
sh0ne said:
Hello Guys!
I got today a new P3110 and I discacharged it to 2% and I plugged it now to load.
I have seen the charger pushes 2A @ 5V , this is pretty much for a battery of 4Ah, I know from my batteries ( AA AAA and others) that the charging current should be max. 1/3 of the capacity of battery.
So my question is: IS it better to charge it with the Samsung Galaxy S2 charger which provides only 0,[email protected],1V ?
It would last app. 6h to charge it till its full ( can be done over night, hopefully the charger wont melt)....
What do you think about that? Woul it harm to battery(li poly) to do it with small current?
cheers
Click to expand...
Click to collapse
OK, electronics 101, chargers DO NOT PUSH power to a a battery, 2 AMPS is the chargers MAXIMUM OUTPUT, the device plugged to the charger PULLS what it wants (up to a maximum of 2A of current) so it can charge in a reasonable amount of time, you may be able to charge your tablet with a lower output charger but all it would do is take longer to charge (if the charger even had the power output greater then the static draw of the device), which is why most tablets simply CANNOT be charged by the USB 2.0 port on a computer or other small .5 A output chargers. You may very well charge while generating less heat, because of the slower charge cycle using the .7A S2 charger, but at the same time if you try to use the tablet while it's charging on the smaller charger it may very well drop in battery percentage as the smaller charger may not be enough to maintain the current requirements to charge the battery and run the device.
So in short, would charging with the smaller charger harm the battery, NO, but if it is enough to actually charge the device it will take atleast DOUBLE the amount of time to recharge as it would with the regular 2A charger.
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!).
Hello!
It's been a while since I don't have an Android device (Iphone user lately) and I'm buying this beauty these days.
I have two questions: First, right now the 45w charger is out of stock so should I buy the 25W instead just until I find the best one (expend money).
Two: How shall we charge this device? All night? Just 2 hous like Iphone? Please help me out on this.
25W vs 45W is really just a matter of the time it takes to charge the phone. And right now, available evidence suggests that its not worth it. As for how to charge it? All night is fine, as the phone will stop charging the battery when it is fully charged.
does the phone will stop charging the battery when it is fully charged?
Deiota77 said:
does the phone will stop charging the battery when it is fully charged?
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Yes, that is always the case.
I would recommend buying a 45W (or higher) USB PD PPS power supply. That will work on Samsung devices. But keep in mind: it has to support PPS to allow voltages between something like 5V, 9V, 15V etc. If it is only USB PD, it will only charge at 15W.
I have the Anker Nano II 65W that has PPS, but there is also a 45W version. But that is just one option, there are plenty of other products out there that support 45W USB PD PPS
Deiota77 said:
does the phone will stop charging the battery when it is fully charged?
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LAtest equipment come with a battery health function it basically charges fast up to 80% and then slowly charges the remaining 20% to extend battery life. Once at 100% it won't charge at the same level, reducint the current/voltage.
I really don’t want to damage the battery like it happened with my iPhone (1 year and 89%).
That’s why I’m asking!
Please post your own experiences.
Deiota77 said:
I really don’t want to damage the battery like it happened with my iPhone (1 year and 89%).
That’s why I’m asking!
Please post your own experiences.
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The worst thing for mobile phone batteries is heat. So running the display all the time and gaming are probably the things to avoid. Which unfortunately...Is what most phones are being designed for these days. So don't let the phone get hot, and try to keep the charge level under 80% if you want the battery to really last. But batteries WILL degrade. There is no way around that. The best you can do is try to limit the damage.
Deiota77 said:
I really don’t want to damage the battery like it happened with my iPhone (1 year and 89%).
That’s why I’m asking!
Please post your own experiences.
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Two things kill the battery: heat and high/low voltages
In an ideal world, the Li-ion battery is at around 20°C and stays at around 3.8V.
Use the slowest possible charger whenever you can (5W e. g.)
Avoid fast charging as often as possible
Don't charge past 80% and don't let it drop below 20%
Don't let your phone stay at 100% for too long. Nothing will happen but the high voltage will degrade the battery (like if you leave your device plugged in every night).
In theory you shouldn't charge your device when it's hot and so on but I mean if you live in Spain for example and it is summer. What else are you going to do? So avoiding charging the ambient temperature is too high, is something you can't really do. (Yeah, in Spain most homes to have AC but you get the point )
I have taken care of my OnePlus 7T Pro's battery since I have received it 2 years ago. According to OnePlus Diagnostic it started at around 97% health (new device) and is now at 93%. I almost never charge above 80% and have a Tasker routine to only let it stay at 60% over night and charge to 80% right before my alarm rings. I use ACC (Advanced Charging Controller) for that. But it requires Magisk.
That might be a bit extreme but I have only lost 4% after 2 years and countless battery cycles. Keep in mind that every now and then you should go from 0% to 100% to let the system calibrate the battery so that it accurately reports its charge. This is the only reason why you should do this so that the system knows how much capacity the battery has. And if you mostly stay between 20–80% all the time, it might think that 80% is its max charge and start misreporting the percentage.
Thanks for all that great tips. I think I won't ever buy an extra fast power charger, I'll use a normal one...
is it safe to use 25 watt charger of s 21 TA-800 for charging s22 ultra?
osamaelgabry said:
is it safe to use 25 watt charger of s 21 TA-800 for charging s22 ultra?
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yes, enable fast charging and limit to 85%