Develop Bugs

so, the battery drain is real...

I thought people were just exaggerating (i still have hope that i'm exaggerating) but man, i just got this phone and holy hell is the battery getting destroyed by "android os"
It won't even last a day with minimal/medium usage (some bluetooth and hotspot use here and there)
I'm coming from a galaxy s3 (which had better battery life).
I've tried installing a 5.1.1 rom but it seems to have no effect.
Has anyone figured out how to 'fix' this? Or can recommend a good rom (or kernel?) to get battery life representative of what i think a 3000 mah battery should be?
Thanks.

rotatorkuf said:
I thought people were just exaggerating (i still have hope that i'm exaggerating) but man, i just got this phone and holy hell is the battery getting destroyed by "android os"
It won't even last a day with minimal/medium usage (some bluetooth and hotspot use here and there)
I'm coming from a galaxy s3 (which had better battery life).
I've tried installing a 5.1.1 rom but it seems to have no effect.
Has anyone figured out how to 'fix' this? Or can recommend a good rom (or kernel?) to get battery life representative of what i think a 3000 mah battery should be?
Thanks.
Click to expand...
Click to collapse
Greenify and the .97 OTA seems to provide decent battery life. Getting about 5 hours+ of SOT. Try using a separate app to see which apps are consuming the most battery and disable all the system apps you don't use.

I installed a barebones rom.
What concerns me is i had the same set up on my Galaxy S3 (5.1.1. lollipop with same apps), and the battery life on this zenfone has just been atrocious (leading me to believe 5.1.1 is not the problem, per se).
Am I wrong, did they not optimize this phone properly or something?

I do not have any issue with batery life. Mine last one day easy with medium to heavy use. Just do some charging cycles

I usually get a day with 4 to 6 hours SOT, without doing anything special to save battery

Do 3 drains to 1 % - you may find it stays longer during the lower 20% range so use a youtube film or sommat to blast it down,
then do a factory reset on the latest build.
Did this at the beginning when was only getting 10hrs max ugh !
Now easy 36hrs decent usage

I get a full days use (medium/heavy) with mine, not rooted not custom rom. I usually have about 20% left before it hits the charger. I have noticed small increases in battery life at every firmware update. I can't really complain, came from a Galaxy S5 and battery was about the same if not worst, but S5 had removeable battery. I've used a lot of smartphones and honestly, most will get your through the day and evening but that's about it, yeah, you might have some for the next day but most will through it on the charger by end of the night. My wife has the Iphone 4s and yeah, the battery lasts longer but the screen is almost half the size of mine, screen size makes a big dif.

Battery drain while powered off and on-Please help!

New here and new to Android. I'll try to make this as brief as possible:
Two weeks ago I purchased a used "refurbished" Galaxy Tab S 8.4 with Lollipop installed. I very much wanted to try to make the slow but gradual switch from iOS and thought this would be a good place to start.
Battery life is horrendous compared to iPad. Here is the issue broken down:
Powered on. Battery drains at the rate of 1 percent an hour in standby.
Powered OFF. Battery drains at the rate of 1 percent an hour.
Powered on and using for web, video, etc (no games). Battery drains at the rate of ~10 percent every 15 minutes or so.
What I've done:
Wifi OFF except when in use
Location services OFF
Sync OFF
Bluetooth OFF
Screen at just below 50 percent
Wakelock detector finds some activity (mostly Android battery "WLAN" monitor stuff)
Did full restore
Most importantly: I REPLACED THE BATTERY WITH A BRAND NEW ONE and am seeing nearly identical drains as I did with the stock battery that was two years old
I have scoured the internet, rooted the device to try to kill any rogue activity, and "reseated" the battery connector 3 times.
Can anyone tell me WHY this battery is losing one percent an hour while completely powered off?
One clue is that, with everything turned off (listed above) the battery drain is nearly identical when off as it is when it is "sleeping" which would indicate...well, something.
I'm frustrated that I have been focused on fixing this issue rather than enjoying my "new" Tab S.
Any help would be greatly appreciated.
Thanks!
EDIT: I have read through other batter drain threads here and, although others share similar problems, don't have an answer. Maybe there is no answer?

I had a similar battery drain (when the device was off) 1.5 years ago with my couple of months old tablet. Had to take it to warranty repair twice, on the second attempt they changed the battery connector and the power circuit (if I remember correctly), and that was enough to fix the problem.
If the tablet drains the battery while completely off, it's clearly a hardware issue.

I'm thinking hardware has to be the culprit too, at this point. Very frustrating as this is a used tablet and out of warranty. I have done everything possible to try and get decent battery life out of this thing to no avail. I'm loving android but have a bad taste in my mouth as to their hardware. Should I keep or just get a couple hundred bucks on ebay? I'd be thrilled with this if the battery life came anywhere near the iPad mini.

The 8.4" is known for having a problem with the battery connector (maybe flexing of the case makes it loosen), some people have soldered the battery wires directly to the motherboard and say it fixed the problem, Samsung knows there is a problem with the battery connector according to some service centers, one service center actually fitted a more heavy duty connector to fix one problem according to what i read.
John.

I would contact the seller and try to return it and then get one from a different seller.
~ Assuming you didn't buy from some random ebay seller who has fake rating >.<

Hi,
I've been using this Tab S since July 2014 and been very pleased of it.
I only use it every night for Web browsing or watching movies.
Not any games or any social network or anything draining the battery.
Average autonomy was around 7 to 8 hours.
9 months ago it has started to drain a little bit more and especially when off (totaly off, not in sleep mode)
Before that event I was turning it off at night and 24 hours later the battery level was exactly the same. (zero percent of drift)
Then it started to suck a little bit every day: 1%, 2%, 3% each 24 hours when completly OFF.
First thing I've done was to make a wipe cache/data and restore to factory settings from recovery mode.
It didn't help.
Then Samsung released Lolipop Upgrade so I did it.
It didn't help any more.
So I ordered a new battery to an official dealer and replaced it.
You know the answer.... didn't help.
Then Marshmallow has come and I did it.
.... idem.
So as electronics and automation technician I am, I decided myself to do some measurements.
I opened the Tab S and checked battery voltage when off every hour with a high accuracy Fluke D.M.M.
And I found that it was loosing ~34mV every 24 hours, which makes the 3% loss.
(Boring calculations just for knownledge : LiPo Vmax 4350mV - LiPoVmin 3200mV = 1150mV corresponding to 100% capacity.)
First thing I did after that was to make the same check but with battery disconnected to the Tab S.
And you know what? not even a mV drained in 24 hours when not connected to Tab S PC Board!
Then I measured the resistance between + and - socket on the PC board : value between 800KOhms and 1,2MOhms.
Same values when I crossed the wires.
Theses values are too low, I should have found many many MOhms.
I've also checked the battery connector that some other guys said it was loosy or bad soldered: that's not the case but I've soldered it.
same problem.
MY CONCLUSION: it's a hardware problem.
Maybe it's a drifting component, probably a capacitor which as lost insulation, or a defective diode.
Unfortunately I don't have the diagrams of this Tab S and can't diagnose it.
Is there on XDA any guy from Samsung Tech Support who can help me?

No answer?
Anybody has Galaxy Tab S 8.4 diagrams?

rotobadger said:
I'm thinking hardware has to be the culprit too, at this point. Very frustrating as this is a used tablet and out of warranty. I have done everything possible to try and get decent battery life out of this thing to no avail. I'm loving android but have a bad taste in my mouth as to their hardware. Should I keep or just get a couple hundred bucks on ebay? I'd be thrilled with this if the battery life came anywhere near the iPad mini.
Click to expand...
Click to collapse
i had the same issue Android – Marshmallow Android – Lollipop etc battery life sucks on the upgrades.. The battery would not last more than 3/4 hours, it was a pure joke. Best thing is to downgrade to KitKat XXU1ANF8 since my downgrade battery easily last a few days of heavy use.
---------- Post added at 11:19 AM ---------- Previous post was at 11:16 AM ----------
radioham said:
No answer?
Anybody has Galaxy Tab S 8.4 diagrams?
Click to expand...
Click to collapse
Here try this link for service manual

Time to replace battery?

Hello XDA!
I'm here seeking for some advice.
I'm a happy owner of an LG G4 since November 2015.
Phone has been running great (minus boot-loop, now fixed, last September).
Recently I've been noticing battery drains much faster, with the same usage as usual.
I know battery life is a thing, but having never changed a battery, I'm not sure if that means it's time to replace it yet.
I've been using 'Accubattery' for a few days, and out of 3000mAh, it reports 1980mAh, 66% health. Voltage is pretty much always at 3/4 (above 4mV, the bars turns orange sometimes aswell. Not sure if that means something)
Having never used this app before, I wanted to have a second opinion about this result, before I spend money on a new battery.
Notes:
- Last week I decided to try Resurrection Remix, and battery has been going pretty great. Although I reverted back to stock due the lack of a proper camera app/loss of camera features.
- I've been testing various kernels these days. SimpleGX is the one I've been using for the longest, and the early days (months ago) battery life has been great with it. I still use SimpleGX, but battery life drains by 1% every 10 minutes the screen is on more or less.
- In the past, when I was still using the phone fully stock, it used to get really hot (once it even triggered the 'overheating' error). I heard heat could drastically reduce battery life, so maybe... Overheating hasn't been an issue since I started using SimpleGX.
Thanks in advance.

I think all of us LG G4 owners who had owned it for more than a year has been complaining of short bad battery life just like me, on Accubattery app my battery health is currently at 72% (2152 mah out of 3000 mah), like I get maximum 3.5 hours SOT , So I think it's best time for most people to buy a new battery but for me I'm used to a power bank. In few months time I can't wait to purchase an LG G6! I'm giving more time to the LG G4 because in few months time let's see if my battery health drops below 72% of health. Can't say if the battery used to the heat from the CPU specially while charging? That heat might have degraded the capacity of the battery Happy that the LG G6 has thermal pipes and a much better CPU SD 821 that might not heat the battery in long term use

It could be time. If you ever played games heavily like pokemon go or done anything in general which sustained heat long term, it will slowly kill your battery health. With that being said these batteries do tend to go bad pretty quick especially after around the 1 year mark. I personally opted for the power bear extended battery and and nothing but good to report since then. I highly would recommend going for a new battery. Easy and cheap solution

Not a fan of Pokemon Go, but while using it completely stock, it often went hot for long time.
It stopped only after I started using a custom kernel, but I'd say I spent about 6 months with that already.
Not a fan of those extended battery, mainly due the aesthetic factor, but that's more a personal thing.
I will be ordering a new battery soon (Aukey one). Thanks for the advice

Anyone Else Experiencing Terrible Battery Life???

When I got this phone back in October, the battery would last around 25-30+ hours. I would take it off the charger at 6am, and at 10pm it would have around 40% left at least. After the February update, it started to go downhill. By the time Q was released, it was just bad. It's at under 50% now at about 8-9 hours off the charger. By 10pm, it's on battery saver and down to 8-15%. Like, it just went to total sheet. I did go to Q, but the battery life has been about the same.
I haven't installed anything new really. I've even been uninstalling apps to see if anything helps. GSAM battery monitor doesn't show any irregularities in any of the apps I use though. So, I wonder if the battery itself is just crapping out? I use the Pixel stand, and I'm aware wireless charging can degrade a battery quicker, but this is just ridiculous!
Anyone else experiencing this? Did you find a way to fix it?
I'm otherwise going to wait until DP2 to see if that helps, otherwise I am probably going to call Google for a replacement.
Also, I did a factory reset before Q, and that didn't help whatsoever.

Maybe the battery was new at that time so you were getting at 10pm around 40% left at least.
I used to get around 45% left at 05pm, which is about 12 hours from charging before and after q.
In order to avoid disturbance, iam charging it at 06am 100%, then recharging again at 02pm (battery level about 65) so it will stay about 60% at 10pm.
Iam heavy user, screen is on for long time.
I am also using s10+ and mate 20 pro, both have much better batteries.

gettinwicked said:
When I got this phone back in October, the battery would last around 25-30+ hours. I would take it off the charger at 6am, and at 10pm it would have around 40% left at least. After the February update, it started to go downhill. By the time Q was released, it was just bad. It's at under 50% now at about 8-9 hours off the charger. By 10pm, it's on battery saver and down to 8-15%. Like, it just went to total sheet. I did go to Q, but the battery life has been about the same.
I haven't installed anything new really. I've even been uninstalling apps to see if anything helps. GSAM battery monitor doesn't show any irregularities in any of the apps I use though. So, I wonder if the battery itself is just crapping out? I use the Pixel stand, and I'm aware wireless charging can degrade a battery quicker, but this is just ridiculous!
Anyone else experiencing this? Did you find a way to fix it?
I'm otherwise going to wait until DP2 to see if that helps, otherwise I am probably going to call Google for a replacement.
Also, I did a factory reset before Q, and that didn't help whatsoever.
Click to expand...
Click to collapse
If you think your battery is already on its way out you can download AccuBattery. Run it through a few charge cycle and it will give you an estimate of the overall health of your battery. This could help you see if your battery has gone bad vs the updates making battery life worse. I'm honestly leaning towards the updates making things worse. You could also have wakelocks that are preventing your device from going into deep sleep as well. If you're rooted Better Battery Stats is a solid app to help you detect any wakelocks that are preventing your device from going into deep sleep. Good luck!

My battery is not good but I wouldn't say its terrible . It drains pretty quick on standby so I turned off AOD. It drains pretty quick too during usage. I don't think it's a hardware problem, more of poor optimisation. I don't think the battery on the next pixels will be much greater even with a 4000 mah battery because Google relies heavily on sending information back to its servers hence data is always working in the background. Ads are starting to pop up everywhere in most of Google's apps if youve noticed.

Curious what would happen if you restrict Android system in battery manager, does anyone know if it's bad in any way?

zetsumeikuro said:
If you think your battery is already on its way out you can download AccuBattery. Run it through a few charge cycle and it will give you an estimate of the overall health of your battery. This could help you see if your battery has gone bad vs the updates making battery life worse. I'm honestly leaning towards the updates making things worse. You could also have wakelocks that are preventing your device from going into deep sleep as well. If you're rooted Better Battery Stats is a solid app to help you detect any wakelocks that are preventing your device from going into deep sleep. Good luck!
Click to expand...
Click to collapse
So, I checked out Accubattery, and it shows my battery health at 97%, so, maybe it's not the battery after all. I'm still getting 5+ hours SOT, but I was getting that before while having the battery last WAY longer. I actually called Google, and they want to send me a replacement, but, all my funds are tied up in a home loan, so, I can't do it until we close... End of May I'll have a replacement lol.
Thanks for your suggestion though!

gettinwicked said:
So, I checked out Accubattery, and it shows my battery health at 97%, so, maybe it's not the battery after all. I'm still getting 5+ hours SOT, but I was getting that before while having the battery last WAY longer. I actually called Google, and they want to send me a replacement, but, all my funds are tied up in a home loan, so, I can't do it until we close... End of May I'll have a replacement lol.
Thanks for your suggestion though!
Click to expand...
Click to collapse
Good luck! But sounds like you get better battery life than I do overall! I have a brand new device due to warranty circumstances and I have to charge everyday. But I am a power user so it is to be expected, but I was never impressed with the battery life on the XL 3. Overall the 3 XL has very average to subpar battery life. Their refurbished warranty devices are also a gamble, ranging from ones with mechanical defects to large scratches on the screen!

Soo, Digital Wellbeing may be the culprit, at least for me. Uncheck the usage access for DW, then restrict battery and uncheck background data. Let me know if this helps!
I updated to Q beta 3, and my battery life improved, but I then read somewhere that DW might be affecting battery life, so I did the above. Unfortunately, I didn't wait a day or two to see if Q was the reason for better battery life, so, definitely try this and let me know. I went from maybe 15-16 hours of battery life to off the charger at 6:30 and still almost 40% at 10pm. My phone showed the battery would last until about 8:30am when I went to sleep. This is where my phone was when I bought it. Anyway, hope this helps!

Problem with new battery

Hello.
Two weeks ago I replaced my battery (2 years old) bacause the phone bagan to shut down on 35%, it was getting very hot, with very short life after recharge and so on.
They replaced it with genuine battery and now it's not so much better. Yes, now it goes to 1% and then it shuts down, but still the battery gets very hot and the battery life is not much better than the old one. I installed AccuBattery and it showed Estimated capacity: 2000mAh so I decided to try the guides in the forum for battery calibration... now the estimated capacity is 1400mAh
It's running on Oreo firmware and a custom rom Android 10.
What can I do? Is the battery defective?
Any help will be appriciated!
Thank you!

Darn I can relate to your situation, as mine says about 1837 MAH estimate in accubattery, I just bought this phone about 2 weeks ago from someone on craiglist, got it pretty cheap. I was also thinking of changing my battery but it looks like pretty difficult job. Like the most difficult there is just about.
Are you familiar with the HTC battery test? I'm curious what your old vs new batteries would have scored. My phone is on the charger right now and then when it gets to 100 I am going to run that test finally. I have been using accubattery and charged and discharged the battery a couple times since I bought it which helped (it was estimated as low as 44% capacity at one point ). Right now mine is 63% capacity.
Some lean towards it being a software issue. Also hard to say the source of the new battery and they do sit on the shelf 2 years probably at least since the phone is from 2016.
I am reading a thread and trying to find out what the best rom is for this phone and it might help the battery too. I am just having a problem with Windows 7 connecting (the driver install error, need to reinstall the drivers, M9 also has problem connecting to Windows PC so I can't unlock the bootloaders yet).
Update: I forgot to mention, mine hovers around 60-65% in accubattery, and says about 3.5 hours screen on time. BUt I have not been using this as my phone so I am gonna try that after the battery test and see what I am averaging. I am a light user, wanted a metal phone because they are stronger. A Motorola G7 Power would be a good phone if someone wants battery life and not too expensive on ebay.
This is the thread I am checking out: https://forum.xda-developers.com/htc-10/help/q-htc-10-power-hungry-htc-one-m8-t3791451

Hi.
I tried HTC test tool but it didn't show anything. Unfortunately, I hadn't run any tests with AccuBaterry with the old battery and I cannot compare. I'm beginning to think that it's the battery sitting on the shelf for years (I don't know how much time they can sit this way without worsening their properties) or the Android version. In fact when the phone was new, it had an excellent battry life and after I updated to Oreo firmware (official rom) the battry life got worse. I will try installing older rom, maybe even go back to stock to see if there is any difference.
While charging I see on lock screen Rapid Charge, then it goes to Charge, then Slow Charge... It's changing... I don't know if it's normal. Does it change this way for you?

Have you installed accubattery? You should, because it will tell you how your battery compares to the rated stock MAH capacity.
I ran the HTC Battery test, it drains the battery a bit for one hour, and if yours is 70% or higher after that, it is considered good. Mine was at 89% so that is not too bad.
Try again to run the HTC battery test, it's on page 2 of the tests. Also, I installed a program called generic battery drainer, because you want to cycle your battery to condition/calibrate it (especially with an older batter). When I ran that the first time my phone crashed at about 30-40 percent, and got hot. But then after that, the battery started acting more normal with each and every charge and recharge. That and using accubattery to tell me each time how much my battery was holding. According to accubattery my battery holds about 63% (about 1800mah). Accubattery says that it will give me about 4 hours of screen on time. It is not horrible nore is it that great.
With accubattery, you need to have the phone turned on while charging to gather the stats. I like it and I Think it really helps give me perspective on my battery.
I am thinking of getting a Moto G7 Power so that when we have an EMP attack I can still play videos games lol, just need to get an EMP proof storage of some kind to keep it in.
---------- Post added at 10:05 PM ---------- Previous post was at 09:41 PM ----------
Have you done the HTC battery reset? (3-button hold-down for 2 minutes)? DO that first, then charge to 100% and run the test.
To run the HTC Battery test, first charge your battery all the way to 100%, then type " * # * # 3 4 2 4 # * # *". On the 2nd page there's a battery test function.
---------- Post added at 11:03 PM ---------- Previous post was at 10:05 PM ----------
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papinho said:
Hi.
I tried HTC test tool but it didn't show anything. Unfortunately, I hadn't run any tests with AccuBaterry with the old battery and I cannot compare. I'm beginning to think that it's the battery sitting on the shelf for years (I don't know how much time they can sit this way without worsening their properties) or the Android version. In fact when the phone was new, it had an excellent battry life and after I updated to Oreo firmware (official rom) the battry life got worse. I will try installing older rom, maybe even go back to stock to see if there is any difference.
While charging I see on lock screen Rapid Charge, then it goes to Charge, then Slow Charge... It's changing... I don't know if it's normal. Does it change this way for you?
Click to expand...
Click to collapse
No I have not had that issue of it showing different charging rates with the same charger. It could be the cable has a short in it.

How long can you watch videos on youtube on Wifi for?
I ran my htc 10 and my HTC M9 head to head, both on youtube via wifi, watching the same at first but also some different and then later the same videos, until the phones drained and shut off.
Screen brightness for this test turned up to 100% btw.
HTC 10= 3 hours and 14 minutes
HTC M9= 3 hours and 38 minutes
Both phones are used i got the 10 on cl, the 9 on ebay. THe HTC 10 my orange led light does not function although the green led does work, I might try and run the led test. The 10 still has 63% capacity on accubattery. The estimated SOT is 4 hrs 4 minutes.
Has anything changed with yours for the estimated capacity? Have you charged and discharged a few times? Also try uninstalling and reinstalling accubattery then charge it some more, alswyas charge it 20 percent or more at a time it says for accurate estimates.
On a side note unrelated to battery I want to get my HTC Phones to work with windows 7 but the driver install never works so far.

Hi cannabiscure.
It's still the same, about 1750 mAh. I've tried the battery reset with the 3 keys before but actually the Accubattery showed less after that. I don't know, maybe it's not related and maybe I didn't made it right. I'll try again and test it but I need to install rom with Sense because it seems 3424 code is not working on pure Android. Reinstalling Accubattery does not change the readings. But I installed an app called Device HW Info and it shows 2700 mAh when the battery is on 100%. This seems far more logical for a new battery. It also shoes something called Kernel profile - 2744/3049 mAh. I don't know what does this mean.
I'm not watching many videos on youtube on the phone. Most of the time I'm browsing.

What is your screen on time (SOT)? How many hours does it say in the stock battery app and also in accubattery?
I got 3.25 hrs watching youtube on wifi with the screen on the highest brightness, so I could probably get at least 4 hours just web browsing and the screen on about 60-70 percent which is what I normally would use.
Are you using wifi or cell data for browsing, and how good is your connection?
Does rapid charging work on your replacement battery? I heard some don't.
papinho said:
Hi cannabiscure.
It's still the same, about 1750 mAh. I've tried the battery reset with the 3 keys before but actually the Accubattery showed less after that. I don't know, maybe it's not related and maybe I didn't made it right. I'll try again and test it but I need to install rom with Sense because it seems 3424 code is not working on pure Android. Reinstalling Accubattery does not change the readings. But I installed an app called Device HW Info and it shows 2700 mAh when the battery is on 100%. This seems far more logical for a new battery. It also shoes something called Kernel profile - 2744/3049 mAh. I don't know what does this mean.
I'm not watching many videos on youtube on the phone. Most of the time I'm browsing.
Click to expand...
Click to collapse