Develop Bugs

[Q] Instant battery drops

Im getting some weird battery stuff, as well as the Android OS drain. If I restart my phone, once in a while It drops like 20-30%. i'll go from 46% to like 18%. I see the threads about slow draining, but mine seems to happen instantly sometimes (3 different times so far in a week), anyone have solutions? Got it from someone on ebay, can I still/should I RMA?

Someone posted a kernel fix in the international GSII forum, so we're either waiting for that to get ported over here or wait for samsung to release a fix. I have that same bug too. What percent r u getting on the Android OS? Mine is usually in the 60's.

Yeah I saw that thread, and I saw the 2 things causing it. Waiting for that fix I guess, hopefully it solves the big battery drops as well as the small draining. Mines pretty high, 30-50% I believe, and then cell reception takes 10-20% with LOS

That's alot better than mine. Although, I don't have that LOS problem. I'm running stock atm. Are u on a custom rom?

Running Starburst 1.5, stock was better for no LOS. But I like the customization on Starburst. Hopefully by the end of this week the kernel we be ported over.

Most likely a problem with the battery level algo and not an actual battery charge drop. It's probably showing the correct value after the reboot.

Using battery spy I was using like 12%-15% per hour, not even doing anything. Saw online that formating the SD card might help, just did, and now im using .8% per hour. The hell, something was scanning the SD card or something. Much better now, hopefully itll last 10-20 hours instead of 6 hours.
edit: so it went back up again. At .8% it will last 2 days+, but since the events keep taking the CPU, its draining it. I got it down to 4-8% by taking the SD card out. At least it will last a little longer. Cant wait for the fix, this baby will last days after.

Damn that sucks. I just formatted my card too cuz I was running out of options. Keep us updated tho.

so I think media scanner is draining, I downloaded rescan media root from android market and before I was draining at 12% per hour, but when I disable it with the app, it goes down to 5-6%. Anyone else try? Maybe thats something thats draining.

Oh btw have u tried turning off wifi? It only drained 6% after being off the charger for 9 hours. I havent touched the phone during that time span tho. Android os still in the 50s btw.
Sent from my SPH-D710 using XDA App

These are my overnight stats when I was sleeping. It's usually worse when wifi is on.

manekineko said:
Most likely a problem with the battery level algo and not an actual battery charge drop. It's probably showing the correct value after the reboot.
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Click to collapse
this is almost definitely correct. battery doesn't drop 15-20% because of reboot...the reading is wrong. Battery drivers have been bad on a few of the latest android phones. Just look at when your phone stays at 99% for the first 3 hrs of use each day...what, does it just get really inefficient in the afternoon because of food coma from lunch?

toprock23 said:
Oh btw have u tried turning off wifi? It only drained 6% after being off the charger for 9 hours. I havent touched the phone during that time span tho. Android os still in the 50s btw.
Sent from my SPH-D710 using XDA App
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Click to collapse
Trying now, seems to be charging faster too. I was mainly on wifi because cell standby was really high, keep getting LOS. But maybe I wont with wifi off now, and i'll see how battery does. ill keep you updated.

Still bad. Can only wait for the patches/fixes. 8 hours doing nothing almost. Sigh.
edit: sent to the galaxy support on twitter, see how that goes.
http://twitter.com/#!/GalaxySsupport/status/124174089085652992

Hey man, I got one more tweak for u to try. I just rooted my phone w/ the latest zenomax kernel and Starburst 1.5. Download setcpu and create a profile for "screen off". Set it to 200-500mhz on demand. In theory, this should prevent 100% cpu utilization while the screen is off. I'm testing this myself atm, so I can't give u my battery stats yet.

toprock23 said:
Hey man, I got one more tweak for u to try. I just rooted my phone w/ the latest zenomax kernel and Starburst 1.5. Download setcpu and create a profile for "screen off". Set it to 200-500mhz on demand. In theory, this should prevent 100% cpu utilization while the screen is off. I'm testing this myself atm, so I can't give u my battery stats yet.
Click to expand...
Click to collapse
Think I have the v3 version and 1.5 as well. I have setcpu set to 200-400 powersave. ive tried others and same. Suspend and events/0 keeping eating at the CPU. Thanks for the suggestions though.

figured i'd chime in here. i've had days where the battery was fine and days where the battery was absolute trash. it's happened on stock, and it's happened on root. but it almost always seems to coincide with LOS. the first picture is one of several instances where i've had pretty fast drain followed up by an instant dump in charge under normal use. it's strange how after the drop, it slowly works back up then levels off and drains normally. the 2nd pic is from today. i left my phone at home on accident when i went off to work, and when i returned, i had LOS and this battery stat. you can tell where i lost signal . the last pic is from yesterday while i had the phone at work all day and light use; a nice consistent drain.

FU battery drops and FML
Ok so i read all the posts in this thread and i understand theres a issue that effects the phone from even knowing what the battery % is. i had to post these though. i was at 47% then rebooted my phone. phone boots up and yehhh! woop woop 8% now mind you if you look at the graph it shows a nice constant cerve downward but steady because i was using my phone the entire time. now after the restart/batery drop of 40% i kept using the phone constantly but its funny how it took me over a hour of screen on to go from 8% to 5% !!!!! i bet to get from 5% to 1% it will take 2 more hours for sure. you can see the graph start to flatten out like its a super battery after the 40% drop because it didnt really drop to 8% !!! normally i wouldnt care since my phone battery last just as long, it just goes down really slow from 8%-1% but at 5% it auto dims screen and wont let me use my camera for the next 2-3 hours while i knock off the remaining "4%" of battery left. fml

Get Starburst v1.6. He removed DRM processes which should lower Android OS usage and thus battery draining. Plus with the LoStKernel, I haven't had any issues with losing signal since.
Also, use Titanium backup to remove running services that you don't need. I got rid of the stock email client, digital clock, media/social hub if you don't use those. They don't take up a lot of ram, but every little bit helps.
My battery life has improved after battery calibration. I suggest you calibrate if you didn't already so your battery usage graph may be more accurate. Hope this helps.

Thanks for the tips! I was wondering how you would calibrate the battery. Is it the same as wiping battery stats from CWM?

kworker battery drain in sleep mode

Yeah, that's another thread about battery drain overnight. With some screenshots.
ROM is AOKP b23, kernel s Trinity (tuna).
Sometimes it's about 20%, sometimes only 10. And rebooting phone (maybe with wiping battery stats) just before the night is helpful - then I get about 4-6% drain in 8 hours sleep time. And the phone isn't awake at that time (as you may see on graph), it's deep sleeping.
As BetterBatteryStats and SystemPanel tell me, it's system processes that use much of the battery at that time - few 'kworker' ones. I've searched the forums for some time, but still can't find a good explanation why they drain so much, nor why rebooting helps.
1) change kernel - yeah, I know, I can try that, but with stock kernel I've had the same problem - so I try to find the root of it, not just slap a few different kernels and see which one works better.
2) reboot every time before sleep - well... that's just isn't very convenient and weak way to deal with the problem.
See attached screenshots for further info.
So, any clues about what I can do to improve the situation?

Link
Link
Other than that, I couldn't find any relevant answers... perhaps a runaway system process... I'd recommend switching kernels, as this issue is known and yet unresolved. Seriously though, battery stats reports it using 56s, so is it really a major problem that is causing battery drain?

anton2009 said:
Link
Link
Other than that, I couldn't find any relevant answers... perhaps a runaway system process... I'd recommend switching kernels, as this issue is known and yet unresolved. Seriously though, battery stats reports it using 56s, so is it really a major problem that is causing battery drain?
Click to expand...
Click to collapse
I'd check that out, thanks! Yeah I know that it's a known problem, but still can't find any good solution for it...
Well it's the process that uses MOST of the system time during that period, so I guess it's enough to cause a drain. And also, there're multiple kworker processes - each may use a bit, but together they get enough for 10% overnight drain.
Which kernel would you recommend to try next? Franco? Seems pretty popular.
Edit: Seen both of these posts, no good solutions anyway. Will try another kernel, then!

I've had great results with Faux123 and I'm just now experimenting with LeanKernel, which is working well so far (wakelocks nonexistent).

I get the kworkers appearing in system panel too, but it doesnt actually effect my battery life. I lose 4% overnight but they show up in system panel.
Also their percentages never add up correctly. For example system panel shows maybe 1.3% cpu usage in total. But when i click thru to the system processes list, the sum of all kworkers exceed 1.3% by a good amount. So i always just ignore them.

Hmm... So maybe they aren't the root of the problem.
Anything else? Maybe battery need to be calibrated, like charging to 100, wiping stats, then discharging to 0 and again charge to 100?
What's really weird is that excessive drain occurs only with extended no-reboot period. Ie, If I reboot just before night drain will be 4-5%...

Check this out. Normally I get about 10% drain overnight, look at what happened last night..
Completely annihilated the battery, everything turned off.
Anyone have an explanation?
Sent from my Galaxy Nexus using Tapatalk
---------- Post added at 04:05 PM ---------- Previous post was at 04:03 PM ----------
The only thing I can think is that something I was doing when I used the phone before bed, kept some sort of process alive all night.

tixed said:
Yeah, that's another thread about battery drain overnight. With some screenshots.
ROM is AOKP b23, kernel s Trinity (tuna).
Sometimes it's about 20%, sometimes only 10. And rebooting phone (maybe with wiping battery stats) just before the night is helpful - then I get about 4-6% drain in 8 hours sleep time. And the phone isn't awake at that time (as you may see on graph), it's deep sleeping.
As BetterBatteryStats and SystemPanel tell me, it's system processes that use much of the battery at that time - few 'kworker' ones. I've searched the forums for some time, but still can't find a good explanation why they drain so much, nor why rebooting helps.
1) change kernel - yeah, I know, I can try that, but with stock kernel I've had the same problem - so I try to find the root of it, not just slap a few different kernels and see which one works better.
2) reboot every time before sleep - well... that's just isn't very convenient and weak way to deal with the problem.
See attached screenshots for further info.
So, any clues about what I can do to improve the situation?
Click to expand...
Click to collapse
Try using the kernel in my signature. this is a proof of what it gave me.

slimldj said:
Try using the kernel in my signature. this is a proof of what it gave me.
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Click to collapse
Great one! Less than 10% drain overnight, 30% per day with moderate-light usage

tixed said:
Great one! Less than 10% drain overnight, 30% per day with moderate-light usage
Click to expand...
Click to collapse
Awesome. Glad it worked.
Sent from my Galaxy Nexus using xda premium

tixed said:
Yeah, that's another thread about battery drain overnight. With some screenshots.
ROM is AOKP b23, kernel s Trinity (tuna).
Sometimes it's about 20%, sometimes only 10. And rebooting phone (maybe with wiping battery stats) just before the night is helpful - then I get about 4-6% drain in 8 hours sleep time. And the phone isn't awake at that time (as you may see on graph), it's deep sleeping.
As BetterBatteryStats and SystemPanel tell me, it's system processes that use much of the battery at that time - few 'kworker' ones. I've searched the forums for some time, but still can't find a good explanation why they drain so much, nor why rebooting helps.
1) change kernel - yeah, I know, I can try that, but with stock kernel I've had the same problem - so I try to find the root of it, not just slap a few different kernels and see which one works better.
2) reboot every time before sleep - well... that's just isn't very convenient and weak way to deal with the problem.
See attached screenshots for further info.
So, any clues about what I can do to improve the situation?
Click to expand...
Click to collapse
Sounds like you may be worrying about battery life too much. If this is worrying alot you may want to get an iphone. The 1750 mah battery is only rated at 10 hours. Lower your expectations about drainage per hour. The phone is constantly pinging cell phone towers to find the best signal possible even in deep sleep. That is the bulk of your drainage.

das7982 said:
Sounds like you may be worrying about battery life too much. If this is worrying alot you may want to get an iphone. The 1750 mah battery is only rated at 10 hours. Lower your expectations about drainage per hour. The phone is constantly pinging cell phone towers to find the best signal possible even in deep sleep. That is the bulk of your drainage.
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Click to collapse
No thanks, iOS is too restricted for me, and I like Google hardware better (I mean revised by Google, not manufactured ofc)
Yeah, I know, but that's 10 hours of USAGE. And I was getting much differentiated results in the same conditions (like <10% one night, >30% other) - that's what was worrying me.
I don't expect it to last whole week or anything, but 30% of power lost in one night when it's just on the shelf doing nothing (not even connected to wifi) - that's absurd. About 5-10% is ok, I guess. That's what I was getting with my Transformer, anyway - less than 1% per hour in sleep mode with wifi off.

Exact same problem. I'm on imoseyon's kernel. If I reboot I lose about5% over night. If not, about 30+. Some app is waking some system process up that is chugging away with the CPU. If I lay it on my bed our some other insulating surface, it is warm. Yes, my phone is entering sleep mode, no app doing wake locks, just kworker going nuts.

I am using samsung galaxy s2 and i am getting the kworker battery bug too. about 15% overnight which sucks.

derycklong said:
I am using samsung galaxy s2 and i am getting the kworker battery bug too. about 15% overnight which sucks.
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Click to collapse
Same happening here, but only after flashing the latest CM radio. I guess it might have something to do with that.

link i know it will help you,and let system go into sleep

hi guys, i visit the links posted but i'm still problems with that. Using watchdog app i notice that al least once a day it show me warning message about high use of cpu. In my case the process is kworker/u8: (here there's a number from 0 to 6)
My question is: what specific process causing that? There's a way to know it? I ask it because i don't think is battery releted, cause battery is very good, excluding for the monitor usage which is what consumes more...

I know that this is a really old topic but seeing that there's still at least one fresh enquiriy i thought i'd chime in...what in effect may indeed help you is wiping the cache (it did help me on several kworker/u occassions in the past). To do so you have to access the respective menu by booting your tablet while pressing the up volume rocker and the power button simultaneously. Hope this helps

Stock Battery Meter vs Battery Voltage Issue

Hi guys -
My 8.4 has been driving me crazy for the past week. It is not rooted, running the stock Samsung image. The battery percentage seems to be wildly inaccurate. I've read through many of the battery threads here (most seem to deal with the inability to charge completely), but I have noticed some that seem to resemble my problem. The solution seems to be to pop the back off and replug the battery. I have not done that, and frankly, I don't think that's the issue here.
Symptoms: Battery appears to drain unevenly - will drop several 10's of % instantaneously during mixed use, and sometimes level off again. I haven't found any runaway processes. Bottom line, overall less then expected battery life followed by the system shutting down. HOWEVER, if I then reboot, it will boot up anywhere between about 5 and 30% remaining - and will continue to run. Sometimes it will drain quickly again, other times it will run for several more hours. Sometimes if I connect the charger after shutdown, it will immediately jump to 40% upon reboot.
Experiment: Drain battery smoothly after a full charge by looping a local video, and track battery percentage and voltage. When system automatically shuts down, reboot (it pops back to 30% or whatever) and continue. Keep rebooting and running until a reboot registers 0% and immediately shuts back down.
Result: Battery drains VERY evenly and consistently. It's only the android percentage that seems to be erratic and cause the system to shut down. I've attached a graph of what I see. The spikes represent points where I rebooted. Blue line = battery percentage (left axis), orange line = battery voltage in mV (right axis)
So given this, I'm having a hard time believing it's a battery connection issue. My uneducated guess is that unplugging the battery works for some because it forces android to recalibrate the battery meter. I've been unsuccessful in getting it to recal by charge/discharge cycles.
Does anyone have any thoughts or ideas on what I should do next? Is there a way to force a recal of the 0% point without rooting? As a side note, I find it odd that my Nexus 7 simply doesn't boot when it hits zero - just shows a battery symbol. Seems odd that the Samsung let's me constantly boot the thing.
Any thoughts would be appreciated!!
Mike

MikeNE said:
Hi guys -.....,..................
Mike
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Click to collapse
Hi! I own a tab S and some users get this problem also on the tab pro. Its something with the battery connection to the device which causes the gauge to be all wonky. Usually problems like you described need to be replaced by Samsung. If you are under warranty, then they'll replace it for free of charge. Better to be extra safe! Hope this helps!

DUHAsianSKILLZ said:
Hi! I own a tab S and some users get this problem also on the tab pro. Its something with the battery connection to the device which causes the gauge to be all wonky. Usually problems like you described need to be replaced by Samsung. If you are under warranty, then they'll replace it for free of charge. Better to be extra safe! Hope this helps!
Click to expand...
Click to collapse
Thanks...yeah, I saw all the comments about the battery connection. As I said in my post, I'm still struggling to believe that it's a connection issue when the battery voltage - reported through a battery widget - is very reliable and steady. It's only the percentage that's wrong. Sounds more like a software issue to me. If it was a connection issue, I'd think the battery voltage would be all over the place too.
Frankly, I'd rather not send it in if I can avoid it (no service centers local). I'd like to explore all possible other options first. Any other ideas on how to force a real recalibration?
Thanks,
Mike

MikeNE said:
Thanks...yeah, I saw all the comments about the battery connection. As I said in my post, I'm still struggling to believe that it's a connection issue when the battery voltage - reported through a battery widget - is very reliable and steady. It's only the percentage that's wrong. Sounds more like a software issue to me. If it was a connection issue, I'd think the battery voltage would be all over the place too.
Frankly, I'd rather not send it in if I can avoid it (no service centers local). I'd like to explore all possible other options first. Any other ideas on how to force a real recalibration?
Thanks,
Mike
Click to expand...
Click to collapse
When your device is fully charged, My guess is to turn your brightness up to the max and open an app that's like intense graphical games or Google earth. As long its stresses your CPU and GPU. That should make your battery drain really quick and cause random reboots because of the meter. Keep doing so till it reaches 0%. Then recharge. If that doesn't work then I don't know. I've done that many times after I flashed a custom ROM so it would calibrate. Doing that would draw all the power out hopefully

DUHAsianSKILLZ said:
When your device is fully charged, My guess is to turn your brightness up to the max and open an app that's like intense graphical games or Google earth. As long its stresses your CPU and GPU. That should make your battery drain really quick and cause random reboots because of the meter. Keep doing so till it reaches 0%. Then recharge. If that doesn't work then I don't know. I've done that many times after I flashed a custom ROM so it would calibrate. Doing that would draw all the power out hopefully
Click to expand...
Click to collapse
Ok...I gave up. I've tried the drain thing multiple ways. I don't want to root the thing or install a custom ROM because I won't be able to use it on my company network. I called Samsung and set up a return. What really bothers me about this is that without an explanation, it's likely to just happen again -because again, I'm still convinced it's software related.
Thanks anyway,
Mike

Sorry to hear that. Please come back when your device is returned from RMA and tell us how it's doing...

CalvinH said:
Sorry to hear that. Please come back when your device is returned from RMA and tell us how it's doing...
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Click to collapse
Will do Calvin - thanks. For the record, I tried one more thing before I boxed it up. I reflashed the firmware with Samsung Kies3. It all went smoothly, and I had high hopes....but shortly after logging in to start setting it up, the battery immediately dropped from 99 to 88....so no luck. I'll be shipping it out tomorrow. I'll post my findings when it returns.
Mike

Well guys - I got my GTP back earlier this week. The actually fixed it in one day and shipped it right back to me. Unfortunately, there was no explanation or description of the repair on any of the paperwork or their website - so I have no idea what they did. Regardless, it appears to be functioning normally now. I fully charged it when I got it, and then ran it down to zero through random usage throughout 2 days...and when it hit zero and shut off, that was it. It wouldn't turn on again (which is what I would expect). I charged it back up, and it's working fine again. So far, so good.
Bottom line, I guess I had some kind of a battery problem, but it appears to be working now. As I said before, I just hate problems with no explanation - it means they are likely to happen again. I guess time will tell...
Mike

Lineage OS battery drain

Hi!
I've been running Lineage OS for about a week now and I'm experiencing poor battery life. I get around 2 hours of screen-on-time and I'm not doing anything demanding other than browsing and social networking and I have the settings on Efficient in the power menu. I feel like stock was a good 50% better on battery life than LOS.
I also noticed that LineageOS System, Android OS and the Phone Idle processes eat up around 30% of the battery.
I didn't install any battery draining apps and I'm running the latest version of everything.
I tried reseting app preferences but it didn't help.
I also want to note that standby time is amazing. If I don't use the device the battery level stays the same while it's sleeping. When I wake it, it loses 2-3% immediately though. It seems that it only loses battery quickly when the screen is on.
Can someone please help? Is this normal battery life on LOS?

Kr3Ep said:
Hi!
I've been running Lineage OS for about a week now and I'm experiencing poor battery life. I get around 2 hours of screen-on-time and I'm not doing anything demanding other than browsing and social networking. I feel like stock was a good 50% better on battery life than LOS.
I also noticed that LineageOS System, Android OS and the Phone Idle processes eat up around 30% of the battery.
I didn't install any battery draining apps and I'm running the latest version of everything.
I tried reseting app preferences but it didn't help.
Can someone please help? Is this normal battery life on LOS?
Click to expand...
Click to collapse
if you want more battery life you can use Greenify or something like that. It is stopping the background apps. This is a alternative way. Hope you find your solution

KaptanSaMSuN said:
if you want more battery life you can use Greenify or something like that. It is stopping the background apps. This is a alternative way. Hope you find your solution
Click to expand...
Click to collapse
Thanks! Im not rooted yet but im planning to flash superSU.

Kr3Ep said:
Thanks! Im not rooted yet but im planning to flash superSU.
Click to expand...
Click to collapse
Ah ok have a good career w/ android.. bye

Hey.
I'm using the latest LineageOS same as you, on my LG G2 D802 32GB and having the same issue as you. If I leave my phone on table for a night, it usually drains 1 or 2%, but if I start using facebook or facebook messenger, or just browsing the system settigs, or just ANYTHING, the battery percentage suddenly starts to count down, like 1% every minute or so.
So i've tried stock LineageOS kernel and Lambda kernel aswell (most advanced, latest kernel for G2 atm), rooting and using Greenify, turning everything down to minimal, underclocking GPU and CPU frequencies, changing govenors, battery saving modes on, screenbrightness to minimal without adaptive, everything syncing off, bluetooth, gps, and wifi is usually off, but nothing really helped and it's been buggering me for a week. Compared to the Stock 4.4.2 or 5.0.2, the battery is half as good. Also, I've been reading posts and I've noticed that not everybody have this issue, because some people experience really good battery - or they just say that -, on the same phone modell. I've been thinking about reverting back to stock because of that, but I havent given custom roms like (crDroid or AICP, I'm torn between those two) a shot, but that not relevant to you because G3.
If I find a solution I'll let you know.

LineageOS doesn't have any battery draining bugs for me currently. Have you installed a custom kernel?

G3 D855 user here. Can confirm the same issue, with all nightlies I have used so far. Standby is OK, but it still drains faster than stock. When I use the phone though, that's when it begins to go down waaay too fast. One percent per minute or two tops, certainly at least 2x faster rate. Tried to solve it in many different ways, so far to no avail. Asked some people with D855 and lineage too and they had no issue. It's a mystery to me (btw I bought a new battery just recently)

Second that, same D855 with latest baseband 21C, i encounter same bizarre battery drain..

alpike said:
Second that, same D855 with latest baseband 21C, i encounter same bizarre battery drain..
Click to expand...
Click to collapse
I'm glad I'm not alone then!
Same problem as everyone else.
Overnight lose only 1% per hour but using the phone it drains extremely quickly.
Look at this crazy battery history:
I've never had this issue on my other devices running CyanogenMod in the past.
Has anyone tracked this issue down to something in particular?

Phew, its not just me. Stock LOS nightlies, pick any... same issue as described by everyone above.
D855/32Gb etc and can not shake it. Wakelocks are all good, as meant to be, just screen on seems to destroy the battery. Have screen on adaptive brightness with around 50% brightness on slider in the first place.
Something is not quite right. Love every other aspect of LOS apart from the battery drainage.

I've got the issue too. I don'y know why but it starts to drain the battery quite fast during the usage of the phone. Any help will be appreciated.

I don't see an open bug unless anyone else has seen one:
https://jira.lineageos.org/browse/BUGBASH-167?jql=text ~ "G3"
https://jira.lineageos.org/browse/BUGBASH-17?jql=text ~ "D855"

There's also this bug:
https://jira.lineageos.org/browse/BUGBASH-364?jql=text ~ "battery"
which is similar to what happens to me, i.e. get to 30% and then suddenly shutdown.

I think this is the bug:
https://jira.lineageos.org/browse/REGRESSION-372

Clear caches!
I was having this issue, with Lineage OS as well as some others i tried based off CM. I would get better than stock battery life for a few weeks, then suddenly the battery would start draining in a few hours.
Booting to recovery and clearing all caches fixed this issue for me.

No Expert said:
There's also this bug:
https://jira.lineageos.org/browse/BUGBASH-364?jql=text ~ "battery"
which is similar to what happens to me, i.e. get to 30% and then suddenly shutdown.
Click to expand...
Click to collapse
This is a hardware issue with the battery, not a software one. You need to replace your battery with an official one from a reputable source (careful, there are quite a lot of fakes around, so don't be tempted by saving a dollar).
Phjils said:
I was having this issue, with Lineage OS as well as some others i tried based off CM. I would get better than stock battery life for a few weeks, then suddenly the battery would start draining in a few hours.
Booting to recovery and clearing all caches fixed this issue for me.
Click to expand...
Click to collapse
This sounds like some app you're installing on your phone.

engmia said:
This sounds like some app you're installing on your phone.
Click to expand...
Click to collapse
I'd generally think that, but I haven't installed any apps for weeks!

Phjils said:
I was having this issue, with Lineage OS as well as some others i tried based off CM. I would get better than stock battery life for a few weeks, then suddenly the battery would start draining in a few hours.
Booting to recovery and clearing all caches fixed this issue for me.
Click to expand...
Click to collapse
I had already tried this but no luck.
Could you please check your battery stats?
Does the percentage used equal the total of the individual apps?
In my case, it never does, e.g. 15% usage but only 3% used by apps.

No Expert said:
I had already tried this but no luck.
Could you please check your battery stats?
Does the percentage used equal the total of the individual apps?
In my case, it never does, e.g. 15% usage but only 3% used by apps.
View attachment 4126543
Click to expand...
Click to collapse
Same for me - the numbers never add up. When this occours, I can watch the battery go from fully charged to 30% in an hour or two, but the battery usage meter doesn't show anything like that kind of usage.
I'd post a screenshot, but I've just taken my phone off charge and have no data as yet. I'll post one tonight - but since clearing the caches, mine is behaving at the moment, although I'm not getting the same all-day battery I was 6 weeks ago.

Same here
Also experiencing this issue on my 6P. Lineage OS system consumes the largest portion of my battery and I usually only get 1hr 50 minutes max of screen time. The phone also seems to die at minimum of 24 percent. Just shuts off. I no longer think this is a hardware issue either as other people seem to be experiencing this. (On a somewhat unrelated note, I also can't flash SuperSU in TWRP without it going into a LOS bootloop)

[HELP] LG G4 battery percentage jumps

Title. H810 no root.
I'm aware the battery life on this one is not really good. That in mind.
-Example, (nothing running on background, everything but wifi off) using it normally until 14%. Pushed sleep button.
-Turn screen on like 5 mins after and it was 15%, used it a bit then again screen off.
-Turned screen on about 6 minutes later and it was 5%.
-Drained it to supposedly 1% then phone turned itself off.
-Turned phone on again and it was 2% and stayed like that for 10 mins while scrolling twitter with 30% brightness, until it turned itself off again and this time battery is to low to turn on.
Tried factory reset, draining till absolute 0% then 100% multiple times but so far nothing works.
Battery's health is good and factory original, no water, no heavy drops.
Let's say i root it (as far as i know its possible in all models), question:
Is there a way to push battery stats to make battery readings accurate?
Or what do you suggest? thanks.

lRaziel1 said:
Title. H810 no root.
I'm aware the battery life on this one is not really good. That in mind.
-Example, (nothing running on background, everything but wifi off) using it normally until 14%. Pushed sleep button.
-Turn screen on like 5 mins after and it was 15%, used it a bit then again screen off.
-Turned screen on about 6 minutes later and it was 5%.
-Drained it to supposedly 1% then phone turned itself off.
-Turned phone on again and it was 2% and stayed like that for 10 mins while scrolling twitter with 30% brightness, until it turned itself off again and this time battery is to low to turn on.
Tried factory reset, draining till absolute 0% then 100% multiple times but so far nothing works.
Battery's health is good and factory original, no water, no heavy drops.
Let's say i root it (as far as i know its possible in all models), question:
Is there a way to push battery stats to make battery readings accurate?
Or what do you suggest? thanks.
Click to expand...
Click to collapse
Hi,
What you have is normal.
My owen device jumps frpn 12% to 15% after heavy and log use, thats normal, cause battery is cooling down/pre-ucomputed Energy is not consumed and Battery is calculated new.
The other Jump from 15 to 5 thats somthing you should watch closer. did that happen often?
all in all I have a sugestion but answer this first.
How old is Battery and usage time? (heavy or Soft? SOT? and so one)
Battery readings denpend on the Kernel. You are Stock i think?
Titan Kernel gave me awesome Display Sdreen on Times but battery is jumping too.

uweork said:
Hi,
What you have is normal.
My owen device jumps frpn 12% to 15% after heavy and log use, thats normal, cause battery is cooling down/pre-ucomputed Energy is not consumed and Battery is calculated new.
The other Jump from 15 to 5 thats somthing you should watch closer. did that happen often?
all in all I have a sugestion but answer this first.
How old is Battery and usage time? (heavy or Soft? SOT? and so one)
Battery readings denpend on the Kernel. You are Stock i think?
Titan Kernel gave me awesome Display Sdreen on Times but battery is jumping too.
Click to expand...
Click to collapse
Thanks for replying!
Well thats one solved, it wasnt a sudden jump but rather a few minutes discharge doing nothing at all.
Battery is as old as the phone, 2015 and usage, i dont know for sure since it's an import US carrier phone sold to me locally, seems like it was a test phone like the ones you can try at stores. I would say battery use isnt any different than it would be in a daily usage and even if not, would be very rare for a li-ion battery to degrade in such a small amount of time. Gonna ask the seller.
Another thing i notice is very fast battery drain while playing music. I listen to music from home to work, like a 1 hour trip and when i got of home with 81% when i get to my job im at 68%.
And yeah stock everything with android 6.0, as i said currently not even rooted.

lRaziel1 said:
Thanks for replying!
Well thats one solved, it wasnt a sudden jump but rather a few minutes discharge doing nothing at all.
Battery is as old as the phone, 2015 and usage, i dont know for sure since it's an import US carrier phone sold to me locally, seems like it was a test phone like the ones you can try at stores. I would say battery use isnt any different than it would be in a daily usage and even if not, would be very rare for a li-ion battery to degrade in such a small amount of time. Gonna ask the seller.
Another thing i notice is very fast battery drain while playing music. I listen to music from home to work, like a 1 hour trip and when i got of home with 81% when i get to my job im at 68%.
And yeah stock everything with android 6.0, as i said currently not even rooted.
Click to expand...
Click to collapse
Sounds as if the Battery has some Altered Issues. How Often do you charge?
with Music You meen Mp3 or stream? (stream drain battery much faster)
Try custom Rom and titan kernel if u dont need stock services, otherwise rootand use greenify or other.
on Stock i Had SoT of 2 hours max. now i am back to 3 Hoeurs (i´m heavy user some days...)

uweork said:
Sounds as if the Battery has some Altered Issues. How Often do you charge?
with Music You meen Mp3 or stream? (stream drain battery much faster)
Try custom Rom and titan kernel if u dont need stock services, otherwise rootand use greenify or other.
on Stock i Had SoT of 2 hours max. now i am back to 3 Hoeurs (i´m heavy user some days...)
Click to expand...
Click to collapse
Already using greenify. Charging 2 times a day, 1 before going to work, 1 when i come back, plugged while using it.
MP3 from stock music app, since i read somewhere a 3rd party music app caused an user a battery drain-
H810 has locked bootloader, do you know any flash tool?

lRaziel1 said:
Already using greenify. Charging 2 times a day, 1 before going to work, 1 when i come back, plugged while using it.
MP3 from stock music app, since i read somewhere a 3rd party music app caused an user a battery drain-
H810 has locked bootloader, do you know any flash tool?
Click to expand...
Click to collapse
Greenify is much better with Root
first you must unlock your Bootloader.
there are 2 Otions at the moment. Official (don´t know if possible for H810) and USU by @steadfasterX
for second:
https://forum.xda-developers.com/g4/general/unlock-unlock-lg-g4-device-usu-t3760451
read and choose for yourself if that is what you want

Just by a new battery. Original battery can be found for about 8$ at least here in Sweden..

I believe this is normal.
My H815 had it with both the original and a new battery. It used to be really bad when you charged it to 100%, restarted and it would drop immediately to 80%.
Also, especially on stock LG stuff (the graph on custom ROMs seems to be smoothed out), the battery graph was a mess of random spikes and dips