Battery deterioration on s7 exynos - Samsung Galaxy S7 Questions and Answers

Hi Guys,
I have my s7 for about 3 months now. The battery performance was excellent for the first month. It would last well over a day even with heavy use. My battery performance lately has been horrible. I found that the battery performance has changed with the latest update on 1 November as shown in the link below
https://www.sammobile.com/firmwares/database/SM-G935F/XFA/
I have taken the phone in to Samsung and they erased the device and reloaded the software. They've attributed the poor battery to bad network reception. My reception in the office isn't great but I am always on Wifi. I have also been in the same home and office when the battery was great, so the reasoning does not make any sense. Please find attached my battery performance for today.
The other strange thing is when I use the original charger that came with the device but use normal charging (not fast charge) the battery takes over 12 hours to charge to full which doesn't seem right.

That is way too long for regular charging. I charge my phone on regular charging, and it takes about hour and a half to charge fully. Try another cable, I always blame them first.
November update has been a pain for me too. What's on top of your usage list in samsung's battery stats?

MrDusan said:
That is way too long for regular charging. I charge my phone on regular charging, and it takes about hour and a half to charge fully. Try another cable, I always blame them first.
November update has been a pain for me too. What's on top of your usage list in samsung's battery stats?
Click to expand...
Click to collapse
Android system at 23%

lol @ 12 hours. That isn't good for sure bro! I would try a other cable and if that doesn't work try a other charger and if that fixes that then send the charger back under warranty.

RiTCHiE007 said:
lol @ 12 hours. That isn't good for sure bro! I would try a other cable and if that doesn't work try a other charger and if that fixes that then send the charger back under warranty.
Click to expand...
Click to collapse
But the charger works fine with fast charging

nadeemkola said:
But the charger works fine with fast charging
Click to expand...
Click to collapse
And what if you charge the phone while its off?

Related

Does Your Battery Charge To 100%, If Not Where Does It Stop?

ive been a nexus s user for almost two days now and i noticed that my battery level stops at 96%. is this normal being as though gingerbread is up and coming and this is the first phone to have it? also i seen a thread on here that shows you how to push your battery to 100% but i also read that the phone may overheat.....im not too sure about that. i have done 2 charging cycles by killing the battery completely and recharging. with my heavy use that i did i got 7 1/2 hrs use. is that normal or is that bad? are there any tips and tricks or will there be a hotfix launched in the near future. thank you for any comments an questions.
charlieb620 said:
ive been a nexus s user for almost two days now and i noticed that my battery level stops at 96%. is this normal being as though gingerbread is up and coming and this is the first phone to have it? also i seen a thread on here that shows you how to push your battery to 100% but i also read that the phone may overheat.....im not too sure about that. i have done 2 charging cycles by killing the battery completely and recharging. with my heavy use that i did i got 7 1/2 hrs use. is that normal or is that bad? are there any tips and tricks or will there be a hotfix launched in the near future. thank you for any comments an questions.
Click to expand...
Click to collapse
See my post in the Accessories forum. The only way to get a true 100% FULL charge is to charge the battery via a wall charger. Since I bought a wall charger and couple extra OEM batteries on Ebay, my battery is lasting significantly longer.
turbodroid said:
See my post in the Accessories forum. The only way to get a true 100% FULL charge is to charge the battery via a wall charger. Since I bought a wall charger and couple extra OEM batteries on Ebay, my battery is lasting significantly longer.
Click to expand...
Click to collapse
i charge my battery to 100% without a wall charger.
but with a USB charger that i bought
ghost010 said:
i charge my battery to 100% without a wall charger.
but with a USB charger that i bought
Click to expand...
Click to collapse
What happens when you pull the cable out? Does the battery immediately drop to 97%? Since it likely does, then it's not truly charging to 100%.
turbodroid said:
What happens when you pull the cable out? Does the battery immediately drop to 97%? Since it likely does, then it's not truly charging to 100%.
Click to expand...
Click to collapse
mine did that earlier this morning i saw it charged to 100% and as soon as i unplugged it it dropped to 97%.
charlieb620 said:
mine did that earlier this morning i saw it charged to 100% and as soon as i unplugged it it dropped to 97%.
Click to expand...
Click to collapse
That's what everyone's does and why I pointed you to my post. Get a spare battery and a wall charger and charge your batteries to a true 100% like I do. They last WAY longer.
http://forum.xda-developers.com/showthread.php?t=955555
I've been doing that since day 1
standalone battery wall charger is the best
Sent from my Nexus S using XDA App
does it matter which wall charger I buy?
will this work? http://cgi.ebay.com/Desktop-Wall-Ba...191990?pt=PDA_Accessories&hash=item4156be62f6

[Q] Why Sensation take very long to recharge the battery...

Hi,
I didn't know what happened.. what My Sensation now take about 6 to 7 hours to complete from 15% to 100% while before i just took 3 hours to complete the charging...
Edit: I knew the reason .. I used Nokia charger and it take more time (double) than the Original HTC charger.. i think mainly because of the charger...
possibly bad hardware, or a ****ty battery, i get full charge from 2% to 100% in about 3 hrs
I had the same problem, sometimes it goes fast, other times it just takes ages, aslo got the non responsive touch screen issue oh, and gps won't fix, it cant find more than 5 sattelites, hurray!
I'm getting this on mains charging now also.
Not sure why - has anyone tried a "power off" charge versus a "power on" charge?
I always charge my phone power off. light to moderate use I get at least a day before charging.
Maybe that's firmware dependent. Some ppl noticed the same but after updating from 1.28.xxx.x to 1.35.xxx.x battery performance, battery monitor behavio(u)r and charging time are improved as well as other bugs fixed. But it's not officially released yet.
HTH
I'm using the 1.35.401 update, and still have this problem, aswell as bad gps reception, high battery drain, and long charge time.
im rocking 1.29.531.2 stock for my fone, and no problems with the battery at all, quick charges, and good to great battery life.
as for the GPS, i think everyone is having that issue right now, the most i ever got was on a completely clear day, 7 satellites :/
my HD2 after running the canada fix thru CWM got a minimum of 12 or a clear day
lucky for me i dont use the GPS that often, if ever
EDIT: also, im using the stock charger about 3 out of 4 of my charges, the rest are from my lappy via usb
It's slow at charging. Get the wall charger from tmobile or use a Samsung galaxy s charger. The galaxy s charger will charge it way faster than the stock htc charger.
ptruman said:
I'm getting this on mains charging now also.
Not sure why - has anyone tried a "power off" charge versus a "power on" charge?
Click to expand...
Click to collapse
I can honestly say that it takes mine about an hour longer to charger while power off than while power is on, don't know y tho. So now I usually just let it drain to about 3% n then charge it..
Sent from my HTC Sensation 4G using XDA Premium App
If you want your battery to last longer you shouldn't let it drain more than down to 20%, due to the nature of the lithium battery
Utking said:
If you want your battery to last longer you shouldn't let it drain more than down to 20%, due to the nature of the lithium battery
Click to expand...
Click to collapse
Any proof/literature on this or this is just what u do n u feel like it helps
Sent from my HTC Sensation 4G using XDA Premium App
its actually a fact, most ppl who have used Li-Ion for at least the past decade know that if you want the best performance, dont let it drop below 15-20% before charging, for optimum batter life and sustainablilty.
same thing goes for if you arent going to use the device for a long time (min. 1 month) charge it to around 50%, then decomission, and the battery will "keep" very well
EDIT: because flamers love their link complaints http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
with 1.35 chargin is much faster. really it's already available ota for unbranded, branded phone owners need to w8 for their carrier ... :\
The_Biz said:
It's slow at charging. Get the wall charger from tmobile or use a Samsung galaxy s charger. The galaxy s charger will charge it way faster than the stock htc charger.
Click to expand...
Click to collapse
i'm interesting by your proposition,could you explain why galaxy s charger is faster than htc charger?
i use to wait 3 hours(-+) for 25 to 100 pcent, how galaxy s charger is faster?
thank you!
ps:sorry for my english but look at my location!!!!!
harnahud said:
i'm interesting by your proposition,could you explain why galaxy s charger is faster than htc charger?
i use to wait 3 hours(-+) for 25 to 100 pcent, how galaxy s charger is faster?
thank you!
ps:sorry for my english but look at my location!!!!!
Click to expand...
Click to collapse
It charges faster because it charges faster. Lol
Idk why it does, but it does. It's the same for my hd2. A friend gave me the galaxy charger for a extra. I tried the charget and it just charged faster for my hd2. So when I got my sensation and saw that the stock charger was slow like the hd2, I tried the galaxy one, sure enough, it was faster too.
Thanks for your informations...
Just got 1.35.163.1
Some people says that improve the charging time.
I will report this tomorrow.
And i will test with sgs charger too!
I have a US version stock. As you know we have no updates yet and no s-off. My phone charges fast sometimes, other times it can be on the wall charger for 6+ hours and not be fully charged. I think its a software issue honestly.
Yes as said earlier recharge when it's at 20% the battery will hold much longer the batteryuniversity is my source too Also spare batteries should be kept at 50% and kept in the refrigerator when not in use.
Hmm the new update didn't do much for charge time for me though.
the charger that comes with the sensation is ~1A which is kinda slow when the phone is on, not as bad as others with only 500mA usb... you should be able to find a usb that give a higher A output and still retain the usb plug (ive seen 1.5A before cant remember where)... failing that if your ingenious you can splice through a different charger and make your own.. could achieve 2A+ but your could burn ya house down or blow your battery up in the process

Battery cycles and fast charging

I have gone through about 3 cycles if battery, with fast charging turned on. Battery life has not been good, especially with screen off drain. Getting about 3hrs SOT while I've heard people say theu get around 6.
So my question is how many cycles should I go through before I judge battery? And should I disable fast charging? Does fast charging damage the battery?
I have the verizon US variant, so there isn't much I can do to improve battery life without root...
Thanks
Turn fast charge off. Turn off AOD. I have an AT&T model. Helped my battery immensely....
I can go the entire day, 6am to 11pm, with average usage and have about 40% battery left. VR drains my battery like butter on a stove.
gleggie said:
I have gone through about 3 cycles if battery, with fast charging turned on. Battery life has not been good, especially with screen off drain. Getting about 3hrs SOT while I've heard people say theu get around 6.
So my question is how many cycles should I go through before I judge battery? And should I disable fast charging? Does fast charging damage the battery?
I have the verizon US variant, so there isn't much I can do to improve battery life without root...
Thanks
Click to expand...
Click to collapse
I'm also on VZW and I've had my S7 for a week. After about 3 days of poor battery life (~2hrs SOT), I turned AOD, location, BT, and NFC off, and disabled a bunch of bloatware (I posted what I did in the battery thread). That improved my SOT to over 4 hours +more standby time. I've since re-enabled BT and location and haven't noticed a difference. I left fast charge on but I use a slow charger at night, just because that's what's plugged up behind my bed.
Sorry, I don't have a source but I'm pretty sure I read something credible that said fast charging doesn't affect battery life/quality. I know that's pretty flaky, so take if with a grain of salt because plenty of other people are saying it helps.
TehPirate_ said:
I can go the entire day, 6am to 11pm, with average usage and have about 40% battery left. VR drains my battery like butter on a stove.
Click to expand...
Click to collapse
How Is this even possible?? Do u have aod on? I need immensity help
I too have some similar questions just like @gleggie has posted
"how many cycles should I go through before I judge battery? And should I disable fast charging? Does fast charging damage the battery?"
Also how to measure battery cycles? Any credible app for the same?
Fast charge doesn't affect battery life immediately, charging your phone faster causes heating and overworking of battery, so slowly, average battery life decreases.
Slow charge when possible! (Wireless charge generally heats more than wall charge!)
... My 2 cents
My phone on fast charging, even wireless doesn't get any hotter than previous phones. My other half has a HTC One M8 for two years and still gets 5-6 hours SOT and has fast charged since day one.
I use fast wireless charging and get 6 hours SOT.
All I turned off is NFC, and my signal is usually full.
amedeonofal said:
Fast charge doesn't affect battery life immediately, charging your phone faster causes heating and overworking of battery, so slowly, average battery life decreases.
Slow charge when possible! (Wireless charge generally heats more than wall charge!)
... My 2 cents
Click to expand...
Click to collapse
So, to slow charge a S7, do we have to turn off fast charging from the settings and then charge via the charger that came with the phone(the so called fast charger) or should we use a charger from an old phone say SIII etc.?
Does this hold true for Motorola's phone also which have turbo charging option?
Also how to measure battery cycles? Any credible app for the same?
Just turning off fast charge you do a lot good for your mobile..
One thing you can do is check battery temperature as you change charger or method. I don't know about Motorola, but maybe its battery is user replaceable... I personally don't know any app that keeps track of battery temperature
billubakra said:
Also how to measure battery cycles?
Click to expand...
Click to collapse
On Exynos you can find it in
sys/class/power_supply/battery/battery_cycle
Edit:
Even better, try my new app
https://forum.xda-developers.com/an...ge-monitor-t3555496/post71003358#post71003358
amedeonofal said:
Just turning off fast charge you do a lot good for your mobile..
One thing you can do is check battery temperature as you change charger or method. I don't know about Motorola, but maybe its battery is user replaceable... I personally don't know any app that keeps track of battery temperature
Click to expand...
Click to collapse
Thanks dear. I have turned off fast charge, should I now charge via the charger that came with the phone(the so called fast charger) or should we use a charger from an old phone say SIII etc.?
Moto G's battery is not user replaceable.
waterdaan said:
On Exynos you can find it in
sys/class/power_supply/battery/battery_cycle
Edit:
Even better, try my new app
https://forum.xda-developers.com/an...ge-monitor-t3555496/post71003358#post71003358
Click to expand...
Click to collapse
Thanks for replying. I wasn't able to find any battery cycle file/log in that location, quite strange. And yes I have the Exynos version. I will test your app and will get back to you.
Of the little what I have understood from various threads here is to charge the battery when it is between 20-40% to 80-90% if you want to have a good battery life. I used to do the complete opposite charge, when the battery is at say 6-7% and charge it till it is maxed. I used to do the same for my laptop, any other tip for the battery?
billubakra said:
Thanks for replying. I wasn't able to find any battery cycle file/log in that location, quite strange. And yes I have the Exynos version. I will test your app and will get back to you.
Click to expand...
Click to collapse
In my app you'll be able to see it, when you turn on
Show sys/class/power_supply in the settings.
As you can see in the screenshot, mine is 52.
sys/class/power_supply/battery
waterdaan said:
In my app you'll be able to see it, when you turn on
Show sys/class/power_supply in the settings.
As you can see in the screenshot, mine is 52.
sys/class/power_supply/battery
Click to expand...
Click to collapse
How to turn on Show sys/class/power_supply in the settings?
billubakra said:
How to turn on Show sys/class/power_supply in the settings?
Click to expand...
Click to collapse
No problem, I've answered in the app thread
https://forum.xda-developers.com/showpost.php?p=71010017&postcount=5

Is it okay to charge overnight ?

Hello guys sorry if it is an innapropriate question but I want to know if it is okay to charge my s8+ over night.. does it damages the phone battery or not ? Thanks
I wouldnt. Doubt it would but would but i find it pointless. It charges pretty quick and wouldnt want to leave it charging for 5+hrs The battery is superb i would quick charge a few mins before bed. Ive gone to bed with 19% and had 17% when i woke the next morning.
ssgunner20 said:
I wouldnt. Doubt it would but would but i find it pointless. It charges pretty quick and wouldnt want to leave it charging for 5+hrs The battery is superb i would quick charge a few mins before bed. Ive gone to bed with 19% and had 17% when i woke the next morning.
Click to expand...
Click to collapse
Yeah I know but i work in the morning at 7 thats why . I use it at night leave it at about 10%
Been doing that with my phones for years, haven't had a problem yet.
technically with Lith Ion the less you let it die all the way the better it is for the battery.
albaniandroid said:
Yeah I know but i work in the morning at 7 thats why . I use it at night leave it at about 10%
Click to expand...
Click to collapse
It's not going to outright destroy the battery, but definitely better not to keep it on the charger. I cannot speak to your schedule and work environment. I charge mine mid day at work. If your usage is generally the same on a daily basis, just find a spot where you can squeeze in a charge or two during the day.
Always changed overnight for ever I can Remeber. Never faced any issues.
Sent from my SM-G955W using Tapatalk
i leave the phone on the wireless charger. it better for the battery or is the same?
let me clear it..
1st of all in modern battry charging technology overnight charging doesnt harm battery at all as lith ion batt never get overcharged..bcoz once its 100%(max threshold) charging stop and phone use batt powr
after that once it get around 100% ( lower threshold) it start charging again...
STILL I PERSONAL ADVICE TO CHARGE OVERNIGHT WITH FASTCHARGING MODE OFF(((OFFF)).
Sent from my SM-G955U using Tapatalk
lipon625 said:
i leave the phone on the wireless charger. it better for the battery or is the same?
Click to expand...
Click to collapse
As far as I know, technically wireless chargers are worse for the battery than a wired. They produce more heat, which technically will have a larger impact on the battery. That being said, I doubt there is any appreciable difference.
xenx said:
As far as I know, technically wireless chargers are worse for the battery than a wired. They produce more heat, which technically will have a larger impact on the battery. That being said, I doubt there is any appreciable difference.
Click to expand...
Click to collapse
Good point. Does ths fan cooler on the wireless one prevent as much heat?
The battery retains 95% battery life after a year of normal charging, I wouldn't worry about depreciation. Relax and enjoy the phone
No, you can charge your android overnight as they are smart enough
Boooom! Lol.....just kidding I hope
Stick with the samsung fast charger. I have a lot of other ones, and only the samsung stay cool (fan) and doesn't cycle like the cheap ones do.
Yes, as most have said, you can charge overnight. I have done this every single night for years, on all my flagship devices. Smartphone batteries have technology in them to stop charging when they hit 200% and only trickle charge them. It won't do any damage or won't cause long term battery life issues.
Just turn off fast charge if you're going to charge overnight.
ssgunner20 said:
Good point. Does ths fan cooler on the wireless one prevent as much heat?
Click to expand...
Click to collapse
I have the new Samsung wireless fast charger and I'd say it's just a tad warm kinda like the USB-C charging
Sent from my SM-G955U using Tapatalk
xenx said:
As far as I know, technically wireless chargers are worse for the battery than a wired. They produce more heat, which technically will have a larger impact on the battery. That being said, I doubt there is any appreciable difference.
Click to expand...
Click to collapse
I've also heard the opposite, as wireless chargers charge slower they put less pressure on the battery which helps it not degrade as fast. How much difference it would make either way I dont know, possibly hardly any.
I do know keeping it between 40-80 is widely regarded as being a lot better for li-ion battery degradation than going to 100% all the time or running it really low. Accubattery for example will say you used about 0.2 battery cycles going from 35% to 80%, but 0.92 battery cycles going from 55% to maximum. They are probably just using that 40-80 rule to work it out, but assuming it is correct, you can see how much effect it has, being nearly 5x more battery cycles despite both being around a 50% charge up.
So charging it overnight will get it to maximum, which isn't great in terms of battery cycles. I have seen a couple of battery apps that I think can manage charging so that it notifies you at 80% to unplug it, but I don't think they can actually stop the charge at 80% if you leave it plugged in (althought I might be wrong on that). Again how much real difference it will make I don't really know, and it probably depends how long you plan on keeping the phone, 1 year then it shouldn't be too much of an issue, 2 years or more and I would probably at least try to keep it between 40-80% when possible.
Ha,
Been charging all my phones overnight.
Been using wireless charging since the note 3 and always please it on the charger when im next to it and not using my phone.
Never had a battery problem
Thanks everyone for their answers ..*let the overnight charging begin*
I used Ampere to check how much current was going to my phone when it was fully charged and it read 0.0 so I believe the phone cuts off the charging function when fully charged. As even on 100% without the "fully charged" portion on, it will still show trickling voltage.
Hope this helps. I also advise turning fast charging off at night just to be safe.

will using the 6x while charging does any harm ??

can using the phone while charging can harm charging port or battery ? im asking this because i was using some days ago my galaxy note 3 like this one day and it stopped charging and was dead..
I don't know about harming the port but, it will definitely hurt the battery, So I don't recommend doing this except when it is an emergency
mahrukhsa2 said:
can using the phone while charging can harm charging port or battery ? im asking this because i was using some days ago my galaxy note 3 like this one day and it stopped charging and was dead..
Click to expand...
Click to collapse
Note 3 was launched 4 years ago. Battery would have gone bad, you would have noticed the degradation.
In some phones, especially those which charge very fast, the temperature can rise to a high level which reduces the life of the battery, but should not impact much if you are using a phone for 1-3 years. Though one needs to stop charging / using the phone if the temperature reaches very high (say above 60 degree Celsius).
Honor 6X charges very slowly while using and the temperature doesn't rise as much (as compared to other phones), hence that impact is likely going to be lower.
Generally it's not a good idea to use whil charging all the time.
I strongly suggest you to use the phone while is under charge the less that you can, especially being careful about using it in combination with mobile data/GPS services/internet browsing and apps that requires particularly usage of RAM. This because the li-polymer battery plugged on charge with the original charger of 6X, that supports fast charge and so will "push" inside it a stronger power than a normal charger, will almost immediately reach a voltage of 4.1-4.2V to ensure the fast charge service and this is the limit that you want to maintain for being sure that the battery will last the longest time. Using it under charge with mobile data or others mentioned above, will easily overcome the 4.2V limit to 4.3V or even more, depending on what you'll be using, and so the ions capacity will be reduced faster, letting them contain less energy than the original capacity while time passes by.
mahrukhsa2 said:
can using the phone while charging can harm charging port or battery ? im asking this because i was using some days ago my galaxy note 3 like this one day and it stopped charging and was dead..
Click to expand...
Click to collapse
i prefer not using phone while charging i think it affects battery life
Sent from my BLN-L22 using Tapatalk
arshilhonor6x said:
i prefer not using phone while charging i think it affects battery life
Click to expand...
Click to collapse
It definitely does hurt the battery.
I try to never use it, except when in emergency
It doesn't but thats not a good practice in general. With continuous usage, it may get more heated that is not good for battery, phone and eventually you.
Because charging itself will hear up the phone and using it may increase further so avoid it buddy.
https://www.lifehacker.com.au/2015/...-iphone-overnight-doesnt-destroy-the-battery/
Myth Debunked: Why Charging Your iPhone Overnight Doesn't Destroy The Battery
jerryhou85 said:
https://www.lifehacker.com.au/2015/...-iphone-overnight-doesnt-destroy-the-battery/
Myth Debunked: Why Charging Your iPhone Overnight Doesn't Destroy The Battery
Click to expand...
Click to collapse
Agreed. Charging phone for long time may impact the battery health in long run
shashank1320 said:
Agreed. Charging phone for long time may impact the battery health in long run
Click to expand...
Click to collapse
I always charge my phone overnight for these years and nothing happens... maybe I switch phones too fast to notice battery issue... :silly:
jerryhou85 said:
I always charge my phone overnight for these years and nothing happens... maybe I switch phones too fast to notice battery issue... :silly:
Click to expand...
Click to collapse
Hehe may be. I will take time to charge in morning or in night during dinner for 20-40% and then in morning for another 40-50% or if wake up early then may be i charge full 100%. Anything above 80 ia good for entire if couldn't charge full still have 20-30% left when reach home in night.
shashank1320 said:
Hehe may be. I will take time to charge in morning or in night during dinner for 20-40% and then in morning for another 40-50% or if wake up early then may be i charge full 100%. Anything above 80 ia good for entire if couldn't charge full still have 20-30% left when reach home in night.
Click to expand...
Click to collapse
Almost the same here; i limit the charge to 80% with Battery Charge Limit, i wake up at morning with 79-78%, i go at work and when i come back at evening usually i have around 55-60% left due various jumps here on XDA, internet browsing, some calls and a few messages. When i go to bed i plug in the phone just for a mid-hour so it can reach 80% again, then i remove it from charge and so on.

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