Develop Bugs

Something is killing my battery?

So this has happened twice recently. I'm not sure if it's the battery or an app that caused this.
Basically I left my tablet at around 40% overnight idling and throughout the day at home while I was at work. I come back around 8 pm and pick it up..battery is dead. Like completely dead, the tablet won't turn on until I charge it a bit. It's kind of ridiculous in an approximately 14-16 hour period my tablet died going from 40% to 0 on idle?
How can I find out what's causing this? I'm not really sure what changed because I haven't really installed anymore apps in the past few weeks.

@C2Q Go into Settings > Battery > and then take a screen print and post it here of what % of battery each app has used.
Should give you an idea from there. If I were guess I'd say it will be Android.System thats draining it...well thats what happened to me.

Thanks. Yeah I have tried that, I also have a bunch of other battery monitoring apps. All it says is Android OS but no specifics. I'm wondering if there's a way to tell after rebooting, what caused that much battery drain (app wise)?

@C2Q Take a screenprint and post it here..

Hmm..I'll try to get one screenshot when this happens again. Yesterday I charged to 100% overnight, unplugged in the morning before work and then came back after work about 10-11h later to see it at 99%. That was pretty normal. Wakelock detector only showed Gmail as the biggest battery usage in those 11 hours. Will keep an eye out to see if this mysteriously drains again.

What rom are you using ? It could be a faulty kernel if android os is running like crazy.

[Q] How is your standby time battery life?

I went to sleep with 100% and woke up with 93%. I left WiFi on, I'm sure that if I turned it off it would improve but I was curious how it would hold up.
Wondering if anyone has tips for improving standby time battery life.
Sent from my Samsung JFLTE using XDA Free mobile app

Are you seriously thinking that 7% while you slept overnight is some kind of problem?

Arround 1-2% overnight(wifi on, but with "Keep wi-fi on during sleep" on Never)
Sent from my Nexus 7 using Tapatalk

Yaz75 said:
Are you seriously thinking that 7% while you slept overnight is some kind of problem?
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Yes.
I can compare that to iPad mini and Windows Phone ( Nokia N925 and N520). 1-2 % with GMS/LTE on.

Same Here
Yes I am also facing the same problem. Terrible battery time. I charged my Tablet yesterday and pulled it out at 100% at 10pm. I put it on Airplane mode and went to sleep. When I woke up today at 6am the battery was showing 70%. It ate 30% at night doing what? I am very disappointed. On Kitkat 4.4.4 I never had such terrible battery performance.

sale 83 said:
Arround 1-2% overnight(wifi on, but with "Keep wi-fi on during sleep" on Never)
Sent from my Nexus 7 using Tapatalk
Click to expand...
Click to collapse
Same here, on a fresh Lollipop install, wifi turned off during sleep, bluetooth always on, and with only a few apps downloaded. Last night I unplugged my tablet and it was still 100% this morning. Been like this since I flashed stock Lollipop after a full wipe.
On 4.4.4 with a lot more downloaded apps I was getting abysmal standby time. The confounding thing was, power use during standby would be fine for a couple days, then turn all to heck, like to 20% plus per night, wifi would turn on by itself during standby and stay on. When I cleared the caches it would go back to being OK for a couple days, then turn bad again. I had even turned off automatic syncing on every app that I was able to do so.
Couldn't figure out which app(s) were the culprit for the life of me. So now I am adding new potentially problematic app back on at a time to see if I can figure it out.

Here is what happened today. Turned off charging at 100% at 10:45pm and woke up at 9 am to 70% on airplane mode. Please tell me that others are facing the same problem!

That does seem pretty weird. This is my N7 since yesterday morning:

Thats not bad at all. I dont know why mine is doing this. What do you guys suggest i do?

I was on jellybean before lollipop and it had waaaayyy better battery life

Ridiculous battery drain? (10% overnight, on standby)

I left my phone over night, with 20% when I put it away, I woke up and it had 10% of battery left.
This happened few times already, I've also noticed huge battery drain on standby (I charged my phone up to 100% today at 10am, at 12:20 it's already down to 97% even though I didn't do anything with it)
Anyone knows what could be the case? I've also checked wakelocks with wakelock detector, but didn't find anything that seemed out of the ordinary.
In battery stats Android OS and "Phone inactive" take the 3 top positions.
I'm on OxygenOS 3.2.2 /w root

If you compare to an iphone, yes 10% loss overnight on standby is a lot. iphone are good on standby.
For an android phone, I would say that it's quite normal, I had phone (Nexus 4 I think) that lose more than 10% in 6 hours in standby.
Try to put in plane mode overnight, maybe you'll see a difference.
But 10% overnight, I don't call it a battery drain. And if you are moving, it can explain your 3% in 2 hours. In the battery stat, if you touch the graph, it will show other graph stat, the GSM signal bar show how much the signal change and how much battery the phone have to use to search for the signal (the less consistant the bar is, the more the battery is drained).

How was your reception overnight? If not green, that may be your issue

lol you think thats bad trying using a xperia z1 or z2 i think i got dodgy phones but they was pathetic for battery life even on stand by i was loosing 12-14% even with there so called stamina mode.
lesson i learned never buy a sony or samsung phone again granted samsung i like better than sony phones at least they have some form of audio quality heck even iphone sounded better than my xperia z1 and z2 lasted longer on battery than them aswell but not as long as my oneplus 3 is so happy with it

maltazar1 said:
I left my phone over night, with 20% when I put it away, I woke up and it had 10% of battery left.
This happened few times already, I've also noticed huge battery drain on standby (I charged my phone up to 100% today at 10am, at 12:20 it's already down to 97% even though I didn't do anything with it)
Anyone knows what could be the case? I've also checked wakelocks with wakelock detector, but didn't find anything that seemed out of the ordinary.
In battery stats Android OS and "Phone inactive" take the 3 top positions.
I'm on OxygenOS 3.2.2 /w root
Click to expand...
Click to collapse
After update to 3.2.2 my also drain faster so, iam going back to 3.2.1 and it gets heat up very fast, I clean installed but still problem is there. So, rolling back.

Find the rogue app causing the drain.
Sent from my Nexus 6P using XDA-Developers mobile app

Check your apps and factory reset

HTC 10 battery issues

Hi everyone, I am running HTC 10 marshmallow stock rom (My country doesnt have nougat update yet) and I faced some problem with the battery recently. I went to travel in iceland for about 2 days, and after i came back I realised a rapid drain in the battery power even during idle.
Below are a few tests that I carried out,
1. I charged my phone to full and carried out the default battery test by typing *#*#3424#*#*. The results was 6% of battery drain with screen on for 1 hour at maximum brightness in airplane mode. From the htc 10 customer service team, they said this shows that the battery wasnt faulty ( The battery is faulty if battery % drop below 70% in an hour).
2. Then i switch to safe mode to check if it was the background apps that causes the problem, even worst, the battery over night in extreme power saving mode was dropped by about 40%. I factory reset the phone.
3. The next day I do the same thing as (2), but this time with airplane mode, the battery drained over night still about 40%.
The battery usage from GSAM apps shows nothing unusual going on in the background at night.
I have to charge my phone at least twice, once before i sleep and once after i woke up, i sleep average of 7 hours a day.
My question is, since its not battery issue, after i factory reset the phone this problem shouldnt persist, can somebody explain to me before i decide whether to send in for repair? Sorry if the thread was repeated.
Attachments below shows the batter drained

This is the battery reduction graph during safe mode tests

There must be a rouge app running somewhere.
Your phone doesn't seem to be "sleeping" at all.
It's whatever is causing the extremely high (100%) awake time, that is causing your battery to drain so quick.
Would be helpful if you could send a screenshot of the main stats page on gsam. Example below: (from my M9)

How Bad is Your WiFi Standby Drain?

Reading through some battery threads I was told that the "proper" way to check your overnight drain was to charge up to 100% and not touch it until the next morning. I tried this last night and WiFi drain was in the 30% range (I used my phone before taking the screenshot which is why it's at 22%) with a total drop of 7% (100-93% over 8 hours).
Does this seem high?
I've got WiFi, NFC, battery saver location, mobile data, and double tap to wake on. The phone is rooted and I'm using a custom kernel (but I'm pretty sure it happened with the stock kernel too). I also have an Android Wear watch attached all night. On AOSP ROMs on my OP3T overnight drain was around 2% if I started at 100% and WiFi was never more than maybe 6% of total drain. Again, I'm not asking how to fix this, I'm just wondering if this is something that others are experiencing.
Thanks!

Mine dropped 2% over four hours of sleep. I'll try with battery saver on.

Mine averages about 3% in 8hrs with wifi on, I'll post a screenshot tomorrow, on freedomos using simplegx kernel

My WiFi drain is very low during idle. Like most flagships of this era.

mine is as same as op, but last night i charged it upto 74 and slept and when i got up after 6 hrs or so it dropped 2 %, strange ... maybe it's the way the phone is charged and calibrated for dash charging

I'm loosing 4-5% in 8 hours.

xocomaox said:
My WiFi drain is very low during idle. Like most flagships of this era.
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Click to collapse
Thanks for these screenshots. Obviously I don't have nearly the SOT that you do in my screenshot, but it looks like if our SOTs were the same you'd probably have similar WiFi percent usage.

Mine's been surprisingly bad - at least, worse than my Moto G5S, Galaxy S8+ or iPhone 8 Plus were. I'm losing like 5-7% every four hours, my battery drain while connected to wifi at work is way worse than either of the other phones mentioned too.
All in all it's kind of disappointing considering how good the OP5T is in literally every other regard.

shadeau said:
Thanks for these screenshots. Obviously I don't have nearly the SOT that you do in my screenshot, but it looks like if our SOTs were the same you'd probably have similar WiFi percent usage.
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We may have similar WiFi usage. But my drain is about .5% per hour, overnight. I don't consider that high, and battery consumption has to be attributed to something. Here is my current usage since yesterday's charge.

On 8.0 the WiFi drain % is even lower, but idle drain per hour is the same. So it doesn't really matter.

Very bad.. Battery go. Down quickly in night..

My wifi drain is also really bad on the latest 4.7.4
Hope they release a fix soon...
Edit... I did a fresh install with stock 4.7.4 and it isn't as bad but still is present. At least it's more tolerable.
Sent from my ONEPLUS A5010 using Tapatalk

So I did another test last night (4.7.4 and SimpleGX kernel) and had 3% drain. With all the comments here I think the high percentage of WiFi is normal and probably not affecting battery life a lot. I am starting to think the kernel may be providing better results than stock 4.7.4 though since a lot of people are mentioning poor battery on 4.7.4.

I don't even know how long, all I can say is my battery drains 3% every 9 and a half hours. Both bluetooth and wifi was on. This is on the stock rom and kernal, not sure how you guys have such high battery drain... Are you guys sure it isn't another app hijacking your battery? Because from my experience the battery stats isn't always perfect. Sometimes I was told that it was my screen (on my old phone) in which it was actually a 3rd party app. After removing the app, my battery drain went a lot slower than usual.

Has anyone tried this toggle in Developer options?

showofdeth said:
Has anyone tried this toggle in Developer options?
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Click to collapse
Just tried that setting last night and it doesn't make much difference.
For all wondering I have an Android Wear device connected 24/7 and location set to battery saving. I also keep NFC and data on all night. I'm not using screen-off gestures though.

I wish it was only 7% or something like that on my OP5T.
I used to be one of you 3%-battery-"drain"-at-night-guys, until the official update to Oreo. Now it uses 36% in 6h38m, of which WiFi is reported being 29% (1044mah, despite 0m active and background usage reported). There is 2.8MB additional use according to the WiFi data usage report that was set to count from today, yet the numbers per app have decreased, so there goes reliability on that. I haven't added or removed any apps, only wiped cache after the update. On standby, it only takes 18 hours for it to drain, which used to be several days.
Another weird thing is that WiFi is terribly slow since the same update, but only on this device. (No numbers yet)
Right now my plan is to test all the mentioned related settings, as well as WiFi off, make screenshots after each nightly test, and finally do a complete wipe and perform the same tests with a minimum of apps, and then redo them again with my usual set of apps. It could still be one or more apps that misbehave on Oreo specifically I suppose, so if there's any indication for that, I will start eliminating apps one by one until I find the culprit.