Develop Bugs

[Q] Battery Life and Battery Reading Problems

Hi xda-dev
I'd like to ask you guys for your input on a battery issue I've been having. I know you get many a question on batteries, despite this I haven't been able to find an answer, nor anything even related to what I'm trying to fix. I'm at a point where the phone wont last a day of idle at school with it not leaving my pocket, and I don't know what I need to do to resolve this rather unique issue.
I have two S3s, and therefore two batteries. On one of the phones the screen is shattered, so I use it to charge the extra battery. To do so I wrote a tasker profile which voices the battery percentage and time charging when it detects that the screen is "on" (i.e. power button pressed). I installed the exported app factory apk to the broken S3 by swapping motherboards. This setup has been working great for me because I never had to plug my S3 in, I could simply charge one battery at home while the other was in use. That is until about 3 weeks ago now where I've begun to notice that the phone I carry with me cannot properly read the percentage of charge remaining on the battery. I believe the issue started after a return to stock rom for unlocking, or flashing leankernel. A factory reset and all caches have been cleared since.
Here are some symtoms:
It remains unable to charge the battery above ~70%, without using the charging phone,
drains very rapidly,
upon reaching 0% a reboot causes the battery to return to roughly 45%,
and finally the battery percentage may raise while the phone is not charging
the charge may sit at within the range of 1% to 3% for extended periods of time (see screenshot).
And here is some data:
Rooted
Custom Rom: CyanogenMod Version 10.1.0-RC5-d2att
Rom build number: cm_d2att-userdebug 4.2.2 JDQ39E eng.jenkins.20130607.100250 test-keys
Custom Kernel Version: [email protected] #56 Sun Jun 16 19:21:51 PDT-2013
CPU governor: ondemand
CPU Min/Max: 384/1512 MHz
Few apps installed as I just did a factory reset, with Google latitude location reporting set off.
While writing this post I swapped the batteries between the phone I use and the charging phone. The dead battery read 4% before I powered down, but when it was put into the charging phone it immediately voiced that that same battery had 81%. The battery that was removed from the charging phone was at 100%, but when the other phone booted that "charged" battery had 89%. That reading was taken when I started typing this post, at 5:45, and now 15 minutes later (6:00) the battery has lost 23% leaving it at 66. The draining phone sat idle while I wrote this post, as I am on my laptop, so that drop of 23% occurred with about 90% screen off time, (note that media scanner would be running since the phone just booted).
In the following screenshots you will notice the time is over 24 hours, this is because the phone has not held a 100% charge since then. Large direct jumps of power are either simple reboots or a battery change. Notice the graph increasing without the charging state being active. I chose not to include a bbs screenshot because the phone had just booted so there were no good reference points. Total screen on time is 4 hours 20 minutes, and 8tracks has had a CPU total of 1 hour 20 minutes with a keep awake of 2.5 hours.
Thanks for any help you can suggest.

Try using only one battery for couple of days, and see the results.

Zev.Isert said:
I have two S3s, and therefore two batteries. On one of the phones the screen is shattered, so I use it to charge the extra battery. To do so I wrote a tasker profile which voices the battery percentage and time charging when it detects that the screen is "on" (i.e. power button pressed). I installed the exported app factory apk to the broken S3 by swapping motherboards.
Click to expand...
Click to collapse
Sorry why exactly was it necessary to swap motherboards?
It sounds like some hardware on ur device is shot either the battery or something else..

atrix4nag said:
Try using only one battery for couple of days, and see the results.
Click to expand...
Click to collapse
Battery length is lasting longer now after using a single battery for a few days. I will continue to stay with one battery.
Heisenberg420 said:
Sorry why exactly was it necessary to swap motherboards?
It sounds like some hardware on ur device is shot either the battery or something else..
Click to expand...
Click to collapse
By "swap motherboards" I mean I attached one screen from one device to the other, it was necessary to install the charging app I wrote through tasker, to automate shutdown when charged, and say battery percentage when power button pressed. The matching motherboard and screen remained in their corresponding phones after that was done.

Insanely rapid battery drain

Hey guys, my nexus out of the blue started to rapidly deplete its battery. My charge will go from 100%-0 within 2 hours with the screen OFF. Yep, a total screen on uptime of about 13 seconds. I hoped the problem was with the battery itself so I bought a replacement 3800mah extended battery and it's still having the same problem, except now it'll drain in about 4 hours with the screen off.
I tried all the things I could find via search, turning off all syncs and settings I could but nothing improved it. Also I've wiped several times, there's no additional apps installed or anything, just stock. The phone seems to charge normally, taking about the same time as when it worked fine to get to 100%.
I'm guessing it's a hardware issue, but I'm out of warranty on the phone. Any of you experience something similar and was able to replace a part manually, or is my phone prettty much a brick.

Also I should add that there is no service currently on the phone since I had to switch it out, It's pretty much on airplane mode w/ mobile network turned off so it's not looking for a signal or lte draining. Another thing is that the drain is pretty consistent, meaning I could be using the phone or have it off the whole time and it's still going to 0% at the same time.

Annoying Battery Issue

My Note 4 is 14mo old and for the last couple months it just shuts off on me even though I have plenty of power left.
I am a light user and usually have enough power for all day use. I rarely use my phone down past 10-15%. I always put my phone on the charger when I go to bed at night when I have somewhere around 20% charge left. If I notice that I might not have enough power to get me through the day I'll put it on the charger somewhere between 30 and 40%.
Lately, like tonight I got a low battery warning at 30% power while I was on the phone. Not even two minutes later it shuts off. When I turn it back on it starts to boot up but then shuts off again. When I put it on the charger it was completely dead. This only happens 3 or 4 times a month but it's annoying because often it happens at the most inconvenient time.
I've also had it shut off and then when I put it on the charger it starts charging at 28% power.
Please let me know what may be going on here and a solution...
Thanks...

tomfrazier said:
My Note 4 is 14mo old and for the last couple months it just shuts off on me even though I have plenty of power left.
I am a light user and usually have enough power for all day use. I rarely use my phone down past 10-15%. I always put my phone on the charger when I go to bed at night when I have somewhere around 20% charge left. If I notice that I might not have enough power to get me through the day I'll put it on the charger somewhere between 30 and 40%.
Lately, like tonight I got a low battery warning at 30% power while I was on the phone. Not even two minutes later it shuts off. When I turn it back on it starts to boot up but then shuts off again. When I put it on the charger it was completely dead. This only happens 3 or 4 times a month but it's annoying because often it happens at the most inconvenient time.
I've also had it shut off and then when I put it on the charger it starts charging at 28% power.
Please let me know what may be going on here and a solution...
Thanks...
Click to expand...
Click to collapse
I had the exact same issue. I had 2 different batteries shutting off at 20-30%!.... Replacing the battery to a brand new one simply fixed it!.... if you are going to order one online try to avoid unknown brands . Also, pay attention there are some fake Samsung batteries claiming to be authentic.
Also if you still have warranty, contact Samsung and they should send you a new one. That's what i also did.

So you think its the battery and not software related? I was thinking software issue because I don't abuse my battery by running it dead and it's an intermittent problem.
I know that the life cycle of Li-ion is greatly reduced by repeated draining to below 10% (my kid's phones suffer from that. Seems like they can't make a battery last more than 6mo) but I've never had a phone battery go bad on any of MY phones including my old Note 2 even after two years. Maybe I just have a bad battery?

tomfrazier said:
So you think its the battery and not software related? I was thinking software issue because I don't abuse my battery by running it dead and it's an intermittent problem.
I know that the life cycle of Li-ion is greatly reduced by repeated draining to below 10% (my kid's phones suffer from that. Seems like they can't make a battery last more than 6mo) but I've never had a phone battery go bad on any of MY phones including my old Note 2 even after two years. Maybe I just have a bad battery?
Click to expand...
Click to collapse
Doesn't matter whether you abuse the battery or not. Some batteries just go bad faster than others. I also think it's your battery.
A factory reset without restoring apps will rule out a software issue though, but since we can't root, it likely isn't anything messing with your battery percent unless it's just an app draining your battery. But even if it were the latter, your battery wouldn't die then start charging at 28%.
Sent from my SAMSUNG-SM-N910A using Tapatalk

Pretty sure this is an actual built in feature. Mines always died at ~20% (since the 5.1.1 update) and once plugged into a charger and rebooted all my running apps and clipboard info is still running as if the phone never died.
My battery is brand new (from warranty replacement) and it still does this so this is why I think it's a "feature" to keep you from losing data in the event of a low battery event. Just my opinion.

It's not a feature. Mine goes all the way to 0% before it dies. I once read to take out the battery, hold the power button for 30 seconds (while the battery is out), then put it back in and see if it helps. This supposedly gets rid of any residual power storage. I don't know if this is a placebo affect by after I did that, my battery now goes all the way to 0 before dieing.

jack man said:
It's not a feature. Mine goes all the way to 0% before it dies. I once read to take out the battery, hold the power button for 30 seconds (while the battery is out), then put it back in and see if it helps. This supposedly gets rid of any residual power storage. I don't know if this is a placebo affect by after I did that, my battery now goes all the way to 0 before dieing.
Click to expand...
Click to collapse
Not exactly a placebo, but not sure if it truly helps. Doing this would clear all electricity stored in any capacitors in the phone. I'm just not sure how this helps.
And my battery goes all the way down to 0% too. It's not normal for the phone to due at any other % (except maybe 1%).
Sent from my SAMSUNG-SM-N910A using Tapatalk

G4 old and new battery issues - turns off when it still has battery

Context:
My dear LG G4 started having some battery issues this summer: it would sometimes turn off at around 15%, usually if I tried using the camera app. It would turn back on, at <10%. Left idle, it would actually increase the battery %.
About 1 month ago (maybe a bit more), the problem started to increase: it would turn off at ~40% - but not always, rarely. Last week, this happened everytime. Sometimes it would turn on back with ~5%, sometimes with 30%. Anyway, weird behaviour.
So I decided to buy a new battery. Can't be sure it's 100% genuine, but reviews say it should be fine (looks 99% like the old one).
Hoping it would finally solve my issues, I put the new battery in the phone. 5% charged - well, it's new, ok, np -> charge it to 100% and then go out to lunch.
The drain was awful, in less than 30 minutes it was at 75% (moderate usage at most). When it hit 74% it turned off. Problem is, this won't even turn back on. Got back to the office, plugged in charger - battery still reported 74%, phone turned on. Disconnected the charger, 1 minute later, phone turns off.
It's like when it hits 74%, it stops working.
Any ideas? Phone is still in warranty for a month, but not sure if this kind of problem is covered.
It's also my second G4, first one was replaced due to bootloop in summer 2016.

Download Accubattery app from Play Store, for the old battery , check it's health, repeat for the new battery.
My 2.5 year old LG G4 still has bad battery life because you know the SD 808 heats up quickly specially on hot summers or while charging, the battery's no1 enemy would be heat! So with the help of the app , I found the battery health had depreciated to 69% of it's 3000 mAh (that is 2069 mAh ) If your battery is new , I think your battery health should be 90%-100% in the Accubattery app!

Buy a new battery its done

Phone never going into deep sleep after battery change

Initially the issue i had with my phone was that it would randomly stop charging and it started to do it quiet frequently as well. I thought that it was charger jack issue but after searching regarding it over internet i found out that the issue was related to battery when it got worn out to a point that phone would refuse to charge it randomly.
To fix this issue, 3 days ago i got my battery changed. Went back home, used Accubattery and Voila! 40% battery health (1500 mAh). The dude put a terrible battery in my phone so i am going to get it changed again from him soon.
However, another issue i found out was that as Accubattery told that phone was never going into deep sleep. It was sipping 7% battery in an hour when the phone's screen was off. I am barely getting 1.5 hour screen on time at the moment if i turn all the power saving features ON. What is causing this issue? Any clue?

Any clue what is causing the issue? There is a very big one staring you in the face: the battery.
I don't know why you would go back to a guy who clearly scammed you with a POS battery, but all your issues stem from the battery currently in your unit. In your position I would be moving heaven and earth to get a genuine battery and finding someone reputable to do the work.