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is it true? Higher Amperes = Faster charging time?

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

Extremely slow charging

Has anyone had a problem with extremely slow charging? I would plug my phone in and wake up 6 hours later and the phone is still not charged. It's even worse now with the extended battery. 7 hours worth of charging and I'm only at 85%. I'm rooted and using the de-bloat rom without the kernel, but it was like this even before the root. Has anyone else encountered this strange issue. I have been using the stock HTC charger.

mine charges in a couple hours using the wall charger and wifi hotspot. In the car or via computer USB, it charges very slowly and if wifi hotspot is on, it loses charger over time.

I typically turn my phone off to charge; speeds things up 2-3 fold.
Sent from my ADR6400L using XDA App

loztboy said:
Has anyone had a problem with extremely slow charging? I would plug my phone in and wake up 6 hours later and the phone is still not charged. It's even worse now with the extended battery. 7 hours worth of charging and I'm only at 85%. I'm rooted and using the de-bloat rom without the kernel, but it was like this even before the root. Has anyone else encountered this strange issue. I have been using the stock HTC charger.
Click to expand...
Click to collapse
Mine doesn't even take an hour . Power it off and try it that way and see how long it takes.

damn mine charges super fast compared to my nexus s i had

If you have plug to the computer it might take longer but not 6 hours, on the wall it only takes like an hour or two to be fully charge.
If it's an issue just take it back and get another one.

Yeah I might have to return this phone. Do you think it matters whether I use the cable that came with the phone, or a regular usb cable to charge.
Sent from my ADR6400L using XDA Premium App

You need to look at the power ratings of the adapters you're using. This behemoth phone can receive 1000ma, while many car and home chargers (like Droid1) are only rated at 500ma. I'm still trying to figure out what the power draw is on the phone when just idling (battery monitor widget is hard to understand), but if the phone draws 250-500ma with regular usage, its going to lose charge plugged into USB (rated at 500ma per port) and running hotspot (drawing closer to 600ma). That's -100ma.
These numbers are guesstimates. I'm not sure if the cable itself can pose limitations, but would suspect that as long as there's no shorts in the wire, it would be able to handle any of the above currents.

fronc said:
You need to look at the power ratings of the adapters you're using. This behemoth phone can receive 1000ma, while many car and home chargers (like Droid1) are only rated at 500ma. I'm still trying to figure out what the power draw is on the phone when just idling (battery monitor widget is hard to understand), but if the phone draws 250-500ma with regular usage, its going to lose charge plugged into USB (rated at 500ma per port) and running hotspot (drawing closer to 600ma). That's -100ma.
These numbers are guesstimates. I'm not sure if the cable itself can pose limitations, but would suspect that as long as there's no shorts in the wire, it would be able to handle any of the above currents.
Click to expand...
Click to collapse
yeah i find it impossible to charge the thing on USB, and it takes forever plugged into the wall with the charger it came with.
Had an evo, and it would almost full charge (from the time it said to plug it in, so 15%) in about an hour and a half. The thunderbolt seems to take 3 hours ish for me. I know I can turn the phone off, but since it usually charges over night its not a big deal, I just think it is interesting that it is so different.

yeah I'm one of the folks who charges FAST. It has really surprised me...I actually thought everyone was charging super fast until this thread.

fronc said:
You need to look at the power ratings of the adapters you're using. This behemoth phone can receive 1000ma, while many car and home chargers (like Droid1) are only rated at 500ma. I'm still trying to figure out what the power draw is on the phone when just idling (battery monitor widget is hard to understand), but if the phone draws 250-500ma with regular usage, its going to lose charge plugged into USB (rated at 500ma per port) and running hotspot (drawing closer to 600ma). That's -100ma.
These numbers are guesstimates. I'm not sure if the cable itself can pose limitations, but would suspect that as long as there's no shorts in the wire, it would be able to handle any of the above currents.
Click to expand...
Click to collapse
+1 on looking at your adapter. Use the one that comes with the phone or make sure that it's rated at 1000mA/1A or more. I tried a MicroUSB adapter I had lying around that came with a bluetooth headset; turns out it only puts out 200mA, so the phone would take forever to charge on it.

ufmace said:
+1 on looking at your adapter. Use the one that comes with the phone or make sure that it's rated at 1000mA/1A or more. I tried a MicroUSB adapter I had lying around that came with a bluetooth headset; turns out it only puts out 200mA, so the phone would take forever to charge on it.
Click to expand...
Click to collapse
with an output of 200mA I would be amazed if you could get this phone to charge at all, without having a custome kernel and underclocking the processor. If anything I would see it maybe staying same battery percentage.

Overall I feel this phone does charge really slow. It is way slow charging on a computer. I was charging it and just doing some light texting and after 4 hours the battery only went up by like 25%.
I have a second wall charger rated at 1000mAH, and after 30min it went up like 10%. This was with the phone off btw. With it on, but not in use, it went up like 4% over 30min. I'm kind of surprised how long it takes to charge. I've had no problems charging it at night. Plug it in before bed, and its full when I wake up. How does the 1400mAH battery size compare to other phones?
I did a little math too, the battery is a 5.18 W/hr battery. So with a 1AH charge at 5V, you'd expect the phone to charge in 2 hrs if only about 50% of the electricity is getting retained by the battery.

I've noticed that mine takes about 1hr 45ish mins to charge from completly dead. My Droid used to be an hour at the most.

i just checked on the adapter it came with, it's 200 mA...did people get better chargers than me or something? Mine takes forever to charge also...been stuck at 99% for 30 mins
EDIT: nvm, i was looking at input, not output...still isnt moving from 99% to 100% though

jbh00jh said:
Mine doesn't even take an hour . Power it off and try it that way and see how long it takes.
Click to expand...
Click to collapse
WTF are u talking about 0-100% or like 70-100%?

lorijuan1024 said:
damn mine charges super fast compared to my nexus s i had
Click to expand...
Click to collapse
@lorijuan1024 im with you man the Nexus S took forever...... To charge

its impossible for me to charge it through the computer, it went up 5% over 3 hours, wasnt on hotspot, sending texts.

Mine charges fine on anything, I am using my old fascinate charger.

Charging speed seems to fluctuate for me... sometimes I get lucky and its fast. Other times, not so much.

over 25 hours to charge note 10.1 ?

Hi I just bought a used galaxy note 10.1
it did not come with a usb wall charger
after 7 hours of charging
a search said its my usb charger
I was wounding if it is normal for this to take over 24 hours from 0% battery on a charger like this
that only gives 0.5 A
or am I doing damage to my battery by leaving on charge for longer than 24 hours
its like a incredibly slow trickle charge
right now its almost full it claims but im not sure if it will ever be full at this rate
I thought maybe 24 hours but now its 1 hour past 24
I was trying to (calibrate the battery )
so I let it die to 0%
I turned the device on half way though charging
noticed it had an x though the batter so I freaked out and tryed plugging and unplugging it like 10 times
I was wounding how bad that might be for the memory of my battery to do something like that
because I unplugged it before it got to 100% when i was attempting to calibrate it
Im not sure how sensitive these batteries are
but your input would be much appreciated

You could use an off brand iPad charger with your USB cable to help it charge faster your typical phone charger will only give off 0.5 ma, so look for one for a tablet
Sent from my SM-P905 using Tapatalk

only one thing to your problem with charging, replace the new one usb cable and your problem will be solving

rohmanch said:
only one thing to your problem with charging, replace the new one usb cable and your problem will be solving
Click to expand...
Click to collapse
I know that but I was wondering if leaving it plugged in will it be bad for my battery at all
to leave it plugged in now approaching 28 hours
the charging logo on the screen appears to have approximately 75% charge so far
I want it to get to 100%
should I unplug it if its not charged in 6-8 more hours
im mainly wondering if it is even possible to fully charge to 100%
on a old ipod usb charger or not

kush king710 said:
Hi I just bought a used galaxy note 10.1
it did not come with a usb wall charger
after 7 hours of charging
a search said its my usb charger
I was wounding if it is normal for this to take over 24 hours from 0% battery on a charger like this
that only gives 0.5 A
or am I doing damage to my battery by leaving on charge for longer than 24 hours
its like a incredibly slow trickle charge
right now its almost full it claims but im not sure if it will ever be full at this rate
I thought maybe 24 hours but now its 1 hour past 24
I was trying to (calibrate the battery )
so I let it die to 0%
I turned the device on half way though charging
noticed it had an x though the batter so I freaked out and tryed plugging and unplugging it like 10 times
I was wounding how bad that might be for the memory of my battery to do something like that
because I unplugged it before it got to 100% when i was attempting to calibrate it
Im not sure how sensitive these batteries are
but your input would be much appreciated
Click to expand...
Click to collapse
You are not harming your device. The only negative is that it will take longer to charge. The red is normal when not using either the correct type charging block or usb cable, it is not harming your tablet.
I would just do what some of the other posters have suggested, getting a new charger made for a tablet, just because waiting that long for it to charge is not practical.

kush king710 said:
I know that but I was wondering if leaving it plugged in will it be bad for my battery at all
to leave it plugged in now approaching 28 hours
the charging logo on the screen appears to have approximately 75% charge so far
I want it to get to 100%
should I unplug it if its not charged in 6-8 more hours
im mainly wondering if it is even possible to fully charge to 100%
on a old ipod usb charger or not
Click to expand...
Click to collapse
SGN 10.1 GT-N80XX series need a specifically designed charger for them.
One thing for sure, it need to provide 2.1 A, 5 V & most phone charger only supply around 0.5 - 1 A.
Most 3rd party charger also only supply around 0.5 - 1 A.
The other is the data pin(s) & it quite different with Apple's charger.
I've tried several 3rd party chargers & Apple chargers (iPod,iPhone & iPad) & most of it unable to charge my N8000.
You need to buy an original charger for your device.
Or you can try buying 3rd Party N80XX charger on eBay from a reputable seller.
That being said, you also need an original cable to be used with the original charger.
Most 3rd party cable can only supply 0.5 A & some 3rd party charger can only be used using specific 3rd party cable.
A long 3rd party cable (10 ft / 3 m) usually can only supply around 1 A.
For example :
I have a Powerbank that uses its own cable to charge at 2.1A rate, but I can't use my own original cable with it
But my original cable is fine & I uses it to charge using my original wall charger.
It takes around 4-5 hours from 4% to 100% (with WiFi ON & all sync on)
0.5 A can't charge your device while in Power ON condition.
To charge at 0.5 A rate you have to turn OFF your device & it will take a long time to get 100%
(N80XX series have a 7000mAh battery so you can calculate how long).
NOTE:
The battery with red cross icon means that the charger/cable isn't designed for N80XX (usually the data pin settings is mismatching the original design), but it will still charge your device at a very low amperage (lower than 0.5A) to prevent damage for using inappropriate charger.

rtan73 said:
You are not harming your device. The only negative is that it will take longer to charge. The red is normal when not using either the correct type charging block or usb cable, it is not harming your tablet.
I would just do what some of the other posters have suggested, getting a new charger made for a tablet, just because waiting that long for it to charge is not practical.
Click to expand...
Click to collapse
yes I will as soon as I can
thank you
I am still a little worried that It will never make it to 100% with the only one I have available for now
does not really sound like anyone has had the patience to let it go to full with this slow trickle

Amazon has the chargers and cables.
Sent from my GT-N8013 using Tapatalk

Charging very very slowly

Hello,
I have had this tabled for a while and it was always charging extremely slowly but I never took it out of the house so it wasn't a bid deal for me. However I have given it to my mother and she uses it in other ways. Anyways, the note 10.1 is the slowest charging device I have ever seen. It takes probably 48h-72h to charge it completely. I am using the original cable and power brick, I have tried ALL the outlets in my house, I have tried using the computer, I have tried using another cable (probably like 5 different ones) and other bricks (from iPads, my note 5, etc) and nothing is working. I have seen other posts regarding slow charging but none of them solve my problem.
Thank you

Thats is not normal .
I would factory reset and flash a stock rom .
Swap battery or take to a service centre .

aleks945 said:
It takes probably 48h-72h ...
Click to expand...
Click to collapse
"probably"?
You can't troubleshoot perceptions and guesses. How long does it actually take--repeatably--to charge from what percentage to what percentage? (i.e. "Went to bed, battery was at 40%, charged overnight for 7 hours and battery was at 60%.")
There are apps to check charging current (Ampere being one of them).
The fastest charge you can get is with the OEM charger in an outlet, not a PC.
Understand that this is a 7,000mAh battery without any quick charging applied to it.
Additionally, if you are using the device whilst charging it, you aren't really charging it since the drain is about the same as the charge; you'll effectively neither charge nor discharge.
Finally, check for battery-draining apps; you might not have a charging problem but an app-drain problem.

Rolo42 said:
"probably"?
You can't troubleshoot perceptions and guesses. How long does it actually take--repeatably--to charge from what percentage to what percentage? (i.e. "Went to bed, battery was at 40%, charged overnight for 7 hours and battery was at 60%.")
There are apps to check charging current (Ampere being one of them).
The fastest charge you can get is with the OEM charger in an outlet, not a PC.
Understand that this is a 7,000mAh battery without any quick charging applied to it.
Additionally, if you are using the device whilst charging it, you aren't really charging it since the drain is about the same as the charge; you'll effectively neither charge nor discharge.
Finally, check for battery-draining apps; you might not have a charging problem but an app-drain problem.
Click to expand...
Click to collapse
The time varies, but it is between 2 and 3 days to charge from 0, never less.
I do use the OEM charger and cable and an outlet.
I do understand that but 2 days seems a bit of a stretch, don't you think?
I am definitely not using it while charging, because it's impossible. It just doesn't charge fast enough to be able to use it. It drains quicker than it charges.
I highly doubt that, I only have YouTube and Chrome installed on it.

Above 6 hours with stock rom and charger is abnormal .
Usual replies .
One cable
Two charger
Three battery or connections .
Four USB port
Five motherboard .

aleks945 said:
I do understand that but 2 days seems a bit of a stretch, don't you think?
I am definitely not using it while charging, because it's impossible. It just doesn't charge fast enough to be able to use it. It drains quicker than it charges.
Click to expand...
Click to collapse
Yeah, 2 days isn't right. It also shouldn't be discharging faster than charging, especially with the OEM charger.
I leave mine plugged into my PC (only 500mA max current) with the screen on (about medium brightness, mostly black screen, which is most power-friendly for OLED) using LectureNotes all day and it will neither charge nor discharge (technically, it's charging at the same rate it is discharging); the percentage doesn't move.
What does Ampere report?
Do you have another charger you could try? any 5V and at least 2A would work.
Also, ensure your cable isn't intermittently open (a break in the cable, temporarily disconnecting the charger).
If the cable and charger are good, then the battery would be the next likely culprit, followed by the charging circuit.
Finally, ensure heat isn't an issue (is it in a case? remove it).

Mine was messed up but I concluded it was the port and cable. I got a new cable and then replaced the charging port and viola. Charge time went from 8 hours back to the usual 3-4

[q] Wireless Charging Vs Wired Charging - Impact on Battery

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.
Click to expand...
Click to collapse
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!).