Battery drain on any ROM for no apparent reason - Nexus 6P Q&A, Help & Troubleshooting

This actually happened since quite a while ago, but only until today could I experiment with the issue, so I figured I'll just post it here and see if anyone know what's going on.
I'm a prominent CyanogenMod user, and although CM for N6P had been slightly buggy, I enjoy its customization and battery life. However, starting from sometime in summer or autumn of 2016, the battery life takes a dramatic dive. Before I had ElementalX limiting the frequency to 1.5GHz+1.2GHz, and it could do 5~6 hours of SOT consistently. After the unknown incident happened, even making 4 is hard as heck. It eats ~20% battery overnight. Since I'm at school and need the phone for day-to-day use heavily, I had to bear with it until today...
Here's the details after today's experiments:
AccuBattery shows 2~3% drain per hour, consistent with my coarse observation. However, the app says there's no wakelock or background apps.
The phone has not been dropped more than 3 times, and as I remember none of the drops happened around the time when battery life starts degrading. This most likely rules out hardware damage.
All ROMs, be it new or old, AOSP-based or CM-based, exhibit this issue. I traced back to older builds of AOSP and Slim, same deal. Traced back to as early as April's factory image (because I suspected it might be the vendor image causing the problem), flashed them clean, same deal. Latest Nougat factory image (N4F26J), same deal. Lineage OS 14.1, same deal.
No user apps installed; ROMs have different system apps, but the slimmest among them (Slim) still has it.
Any help would be welcome!

Related

Interesting battery performance...

OK, I've had my HD2 since November, and I've never understood people who complained about poor battery life. I've consistently been able to go up to 2 days before charging. On the odd occasion, I've left TomTom running and it's drained the battery right down, but overall I've been pretty content with the battery performance.
Until about a week ago. I thought I'd maybe forgot to stick it on charge overnight the odd time, but now realise the battery has started to drain much more rapidly.
I did not change ROM, or install any additional software. I made sure nothing was running that shouldn't be in Task Manager. All of a sudden, I'm getting quite random battery drain - up to 20% drop in an hour. I put up with it for a week, thinking it just needed a hard-reset, so last night I decided to flash a new ROM. I updated to the latest radio ROM, and flashed bobsbbq's latest ROM thinking that would sort it, but after I took it off charge this morning it was down by 15% within an hour.
The drain has levelled off throughout the day, but it's still much higher than I'm used to. I don't use wireless, and I only have bluetooth turned on if I'm on AC power, so I've just got GSM/3G in normal use (and get good reception at home and work).
The fact that the battery drain changed so much in such a short period of time, with no obvious change in usage or software leads me to believe the battery itself is beginning to fail. I usually expect a good couple of years from a mobile battery before I see noticable drops in charge, but that's 6 months.
Is it possible the HD2 batteries are not very well made, resulting in some people having great battery life, and others complaining that it's crap?
elyl said:
OK, I've had my HD2 since November, and I've never understood people who complained about poor battery life. I've consistently been able to go up to 2 days before charging. On the odd occasion, I've left TomTom running and it's drained the battery right down, but overall I've been pretty content with the battery performance.
Until about a week ago. I thought I'd maybe forgot to stick it on charge overnight the odd time, but now realise the battery has started to drain much more rapidly.
I did not change ROM, or install any additional software. I made sure nothing was running that shouldn't be in Task Manager. All of a sudden, I'm getting quite random battery drain - up to 20% drop in an hour. I put up with it for a week, thinking it just needed a hard-reset, so last night I decided to flash a new ROM. I updated to the latest radio ROM, and flashed bobsbbq's latest ROM thinking that would sort it, but after I took it off charge this morning it was down by 15% within an hour.
The drain has levelled off throughout the day, but it's still much higher than I'm used to. I don't use wireless, and I only have bluetooth turned on if I'm on AC power, so I've just got GSM/3G in normal use (and get good reception at home and work).
The fact that the battery drain changed so much in such a short period of time, with no obvious change in usage or software leads me to believe the battery itself is beginning to fail. I usually expect a good couple of years from a mobile battery before I see noticable drops in charge, but that's 6 months.
Is it possible the HD2 batteries are not very well made, resulting in some people having great battery life, and others complaining that it's crap?
Click to expand...
Click to collapse
I had read that some of the HD2 batterys were a bit dodgy as they were siphoning off the batterys from different manufacturers and as a result some are remarkably better than others.
elyl said:
OK, I've had my HD2 since November, and I've never understood people who complained about poor battery life. I've consistently been able to go up to 2 days before charging. On the odd occasion, I've left TomTom running and it's drained the battery right down, but overall I've been pretty content with the battery performance.
Until about a week ago. I thought I'd maybe forgot to stick it on charge overnight the odd time, but now realise the battery has started to drain much more rapidly.
I did not change ROM, or install any additional software. I made sure nothing was running that shouldn't be in Task Manager. All of a sudden, I'm getting quite random battery drain - up to 20% drop in an hour. I put up with it for a week, thinking it just needed a hard-reset, so last night I decided to flash a new ROM. I updated to the latest radio ROM, and flashed bobsbbq's latest ROM thinking that would sort it, but after I took it off charge this morning it was down by 15% within an hour.
The drain has levelled off throughout the day, but it's still much higher than I'm used to. I don't use wireless, and I only have bluetooth turned on if I'm on AC power, so I've just got GSM/3G in normal use (and get good reception at home and work).
The fact that the battery drain changed so much in such a short period of time, with no obvious change in usage or software leads me to believe the battery itself is beginning to fail. I usually expect a good couple of years from a mobile battery before I see noticable drops in charge, but that's 6 months.
Is it possible the HD2 batteries are not very well made, resulting in some people having great battery life, and others complaining that it's crap?
Click to expand...
Click to collapse
I am precisely in the same boat. I am using my battery now for around 6 months. Since last week the battery seems to drain much faster than before. I am still analyzing what could be the reason, but I think it's the battery itself that is getting weak - far too early.
elyl said:
OK, I've had my HD2 since November, and I've never understood people who complained about poor battery life. I've consistently been able to go up to 2 days before charging. On the odd occasion, I've left TomTom running and it's drained the battery right down, but overall I've been pretty content with the battery performance.
Until about a week ago. I thought I'd maybe forgot to stick it on charge overnight the odd time, but now realise the battery has started to drain much more rapidly.
I did not change ROM, or install any additional software. I made sure nothing was running that shouldn't be in Task Manager. All of a sudden, I'm getting quite random battery drain - up to 20% drop in an hour. I put up with it for a week, thinking it just needed a hard-reset, so last night I decided to flash a new ROM. I updated to the latest radio ROM, and flashed bobsbbq's latest ROM thinking that would sort it, but after I took it off charge this morning it was down by 15% within an hour.
The drain has levelled off throughout the day, but it's still much higher than I'm used to. I don't use wireless, and I only have bluetooth turned on if I'm on AC power, so I've just got GSM/3G in normal use (and get good reception at home and work).
The fact that the battery drain changed so much in such a short period of time, with no obvious change in usage or software leads me to believe the battery itself is beginning to fail. I usually expect a good couple of years from a mobile battery before I see noticable drops in charge, but that's 6 months.
Is it possible the HD2 batteries are not very well made, resulting in some people having great battery life, and others complaining that it's crap?
Click to expand...
Click to collapse
You said it yourself, the batterys performance gets worse for every day and should be replaced with a new one every 6 month, atleast.
Some feedbacks in other threads pointed out a possible and unforeseeable cause, the microsd card.
Try removing it and check battery drain, if that's the culprit try formatting it before throwing it away.
Also, as I stated in at least 3 other threads p) it's always a good idea to check battery drain with battclock, it should be 4mA during standby, any big variations from that mean something's draining while phone should be sleeping instead.
steffen1337 said:
You said it yourself, the batterys performance gets worse for every day and should be replaced with a new one every 6 month, atleast.
Click to expand...
Click to collapse
er... are you for real? poor iphone owners should send back their devices for servicing twice a year then
steffen1337 said:
You said it yourself, the batterys performance gets worse for every day and should be replaced with a new one every 6 month, atleast.
Click to expand...
Click to collapse
Yeah mate, that's laughable. I've never had a mobile phone battery go within 6 months. Are you trying to jump start your car with your batteries or something?

Battery life woes with Doze and SOT

I had been having great battery life the first couple of weeks with the Nexus 6P when I first got it, but now I am have major issues with doze and very very low screen on time.
I find that my phone does something weird instead of doze... I was wondering if anyone can provide some insight to this issue. I do not have any social media apps installed and I am trying to make do without crippling Google Now and Location Services :/
Here are some examples of what has happened as of today morning.
http://imgur.com/a/ze0hL
I have already gone ahead and done a factory reset of the device to alleviate any issues, and slowly adding back my applications. I added the last new app on Monday evening and Tuesday I continued to have GREAT battery life with 4.5H SoT over 24H off the charger without pristine signal, either, which is great! However, the following day (with no changes, apps/accounts added/removed) the battery life has become utter garbage.
On the attached pics I had even restarted before taking it off of the charger, so I have no clue what could be the problem. also from 12 (midnight) onwards, I was asleep until taking these screenshots at 645AM at which point I had gone from ~70% to 25% in 7 hours which, in my opinion, is horrible considering the great signal that I had.
Any suggestions and/or help is appreciated! Only thing is that I have to keep the device fully stock due to work reasons.

Possible battery drain introduced in the February security patch?

So a lot of people and myself over on the Nexus 6P subreddit have been discussing about the possibility of some sort of battery drain with the arrival of the Feb patch. On any ROM/kernel combination (and even on stock at some point), my phone very easily reaches 4:45-5:00 of screen time throughout a day that is from 7am-10pm for me. Over the last month, it has progressively gotten worse, on some days reaching low levels with just 3:30 SoT. After using various ROMs, I decided to try out bone stock to see if I would get the same result (this was 3 days ago). And that has been the case... The phone barely reaches 4 hours of screen time.
Well you might suggest: "Disable services such as location and sync" or "What apps have you recently installed that could be causing drains?" And that's the thing. My usage patterns have not changed at all. I barely download new apps and always stick to using the same ones. Today my location was off for a very long time and I've still gotten the same battery. I've been keeping my eye on the awake bar on battery info, and the phone sleeps as it should, so I'm sure there aren't any rogue apps.
I am seeing this as well. I actually went back to stock to see if it was the ROM I was using. Seeing the same battery degradation on stock. Running MMB29Q with Feb security patch as you can see from screen shot. Wonder if Google is aware of this. Cannot be a coincidence.
Me 2
Haven't noticed this at all, I'm getting the exact same battery performance as I always have.
I haven't noticed any extra battery drain either.
I definitely noticed this myself.
I did a factory reset and it seems to have helped, but I've only tested it for one day since.
Heisenberg said:
Haven't noticed this at all, I'm getting the exact same battery performance as I always have.
Click to expand...
Click to collapse
I'm with you. Same battery as previous factory image.
Sent from my Nexus 6P using Tapatalk
I have bought this phone in the beginning of February and my battery experience is TERRIBLE. It drained 20% battery in 16h with 17 mins SOT. I'm extremely disappointed in this device. I tried Stock, chroma and Pure Nexus and even when 0 apps are installed my battery goes AWOL. Really this is a nightmare where I paid alot of money for this phone and it acts like a personal energy waste device.
VnnAmed said:
I have bought this phone in the beginning of February and my battery experience is TERRIBLE. It drained 20% battery in 16h with 17 mins SOT. I'm extremely disappointed in this device. I tried Stock, chroma and Pure Nexus and even when 0 apps are installed my battery goes AWOL. Really this is a nightmare where I paid alot of money for this phone and it acts like a personal energy waste device.
Click to expand...
Click to collapse
1.2%/hr drain isn't great, but not bad either depending on reception/installed-apps/notification/etc
I'm running 6.0.1 feb patch. Get about 0.6%/hr screenoff drain, but I'm mostly on good wifi connection. If running around town on LTE i'd get some where around 1% screen off drain.
I've noticed that ever since the Feb security patch, the battery has drained a little faster than usual also, with no change in usage behavior.... Can someone please notify google about this?
I have not noticed anything different.
Running stock with ElementalX kernel.
I've been noticing the same thing. I used to be able to go for 4+hrs of screen on. Now, 3.5 is normal. I am on PureNexus, but I've not changed anything in the last month, after the update.
I bought the phone on 28th February. 30 minutes after arrive at home, flashed Cyanogen, and draining about 1% each minute with screen on.
Yesterday I flashed PureNexus and now reaches 3.5 hours with screen on. Way better, but still terrible.
I've noticed the same increased battery drain. I've been investigating the issue for weeks and didn't know what caused the issue until hitting this thread.
The February update introduced the SystemUpdateService wakelock on my 6P. It kept the phone awake 95% of the time and I couldn't get rid of it. I updated via fastboot with the factory images at the time. I flashed back to the January build and the wakelock disappeared. Flashed the February update again and SystemUpdateService wakelock came right back.
I didn't try a clean install with the February factory images to see if it would fix it. Maybe it would have, maybe not. I decided to give Pure Nexus a try after I couldn't fix it. I'm considering doing a clean install once the March update is released.
Me 2
Same battery issues as described for me.
I am glad to see that I am not the only one having a problem all of a sudden. I am running stock, but was about to root and run a custom ROM after becoming frustrated with the suddenly increased battery drain. I used to drop only three or 4% overnight, but now it is about 20%, with Google App being a prime user of battery even without OK Google being activated. Doze does not seem to be working as it did before. I am going to try shutting off Wi-Fi and Bluetooth at night to see if that makes a difference, but it never seemed to matter before leaving those on. Also, I do not see a way to automatically turn off push mail service at night or on a specific schedule as I could do with previous phones.
I'm glad. I thought I was the only one experiencing this.
Sent from my Nexus 6P using Tapatalk
Interesting - I have noticed that the battery life has tanked on my 5X fairly recently (been using it for a few weeks - will try on the 6P next).
Presumed it was just a rogue app or something, although nothing seems to be causing excessive wake locks etc. It is hard to quantify though, so it could just be looking for a problem where there isn't one.
I'm doing a clean install on my Nexus 6P from the March security update factory images, should be able to see if the battery life I'm getting is similar to January as I have a fair idea of what percentage my phone was usually down to at the end of the day.
A clean install of 6.0.1 with Feb patch and only stock apps. It's been sitting on my bed since a full charge 5 days ago. Looks like the Feb patch is not having much of an impact on battery life.

Why I went back to Marshmallow (Answer: Battery Life)

So I had Nougat ever since it came out and used it a lot, but went back to Marshmallow a couple of days ago because of:
...Battery life. No matter what apps, settings, versions (B360, B380, B381), recommendations etc. - Battery life is simply better and more reliable on Marshmallow. Yes, I know, I did factory resets, downgrade, upgrade via OTA, deactivated this and that, pretty much everything you read on the threads here and elsewhere, it still couldn't catch up to Marshmallow. Don't get me wrong, battery life on Nougat is not terrible - I even convinced myself over the months that it is pretty much the same or even better, but that's simply just wishful thinking. As soon as I downgraded I could notice a significant improvement.
What do I mean by improvement? For once it is more reliable meaning I know what I get. On Nougat I had days where I got 3 hours SOT, then 4 or 5 on others. I had 2 percent stanby drain per hour, then 5, then 1 - it was just more random. On Marshmallow I always get pretty much the same. Stanby drain of 1 percent or less per hour and SOT of 6 or more hours (I'm at 3:40 SOT at the moment with 18 hours and 45 minutes since the last charge and exactly 50 percent battery left). So not only is it more reliable, it also gives me more SOT and lower standby drain.
Regarding the standby drain: When installing apps like ForceDoze on Marshmallow, it lets the device enter Deep Doze the minute I turn off the phone (meaning I often have deep doze rates of above 98%) which leads to little to almost no standby drain without losing any benefits (notifications still come through when added to the whitelist). Deep sleeps rates are also above 90 percent. With Nougat deeps sleep rates are only around 80 percent (given the same apps, settings etc.) and doze rates are much worse. Yes, I know all about light and deep doze, but light doze doesn't start until 5 minutes after the device is turned off (even with apps like ForceDoze) and those 5 minutes add up, especially if you are checking your device often. Also, it doesn't enter deep doze which arguably consumes less power until much later (often hours) and there is also no way I could change that with ForceDoze or Greenify. What's more, the ForceDoze setting of "ignore device movement" actually works on Marshmallow but didn't reliably work on Nougat meaning the deivce enters and stays in deep doze the minute you turn off your phone even if you are moving or driving etc. This made the difference between Marshmallow and Nougat even greater for me when driving or walking around town.
One additional thing I noticed. is that Android System and Kernel (Android OS) usage was higher on Nougat than on Marshmallow, which also worsened battery life on Nougat for me. Again, this could be reliably replicated with the same apps, settings etc.
Granted, everything else is pretty much better on Nougat (speed, UI, notification bar, lock-screen, security updates, additional features etc.), but if you value battery life above everyhing else (which I do), I still think Marshmallow is the best on the Honor 8 and, frankly, I don't see the point of updating to a newer version of Android if it doesn't come with at least the same battery life, as it is one of the most central features of a phone. I don't know and don't really care whether it's Nougat itself or Honor, I just hope that eventually (maybe with B38X or B39X), battery life will fully match that of Marshmallow. What do you guys think? What's your experience?
I never used MM longer than a day or two before upgrading to N, so I can't comment on which is better, but I can confirm that (with N) I've seen random days where the battery drain is unreal during standby, and other days when it hardly drains at all during standby. But ever since I performed a factory reset after upgrading to N, the drain has been very predictable. Standby drain is minimal and SOT is 6+ hrs. Hard for me to complain when I couldn't get that much SOT from the Sony Xperia Z3 Compact on KK, and that was a battery champ! I finally feel like I'm getting the newest features and great battery life at the same time.
You need a choice for people who never used MM in your pole to make it more accurate.
My wife just got her Honor 8 today. It's on Marshmallow. Mine is on the latest Nogat. Each update killed my battery life not significantly but noticably. I can relate to you wanting to downgrade.
While I never had an Honor 8 with Marshmallow, I was about to update her phone to the latest until I saw this thread and am glad I didn't. If Oreo fixes battery life issues, I'll happily update both our phones to it.
For her, this is her first Android and is coming from Apple. Last thing I wanna do is give her an excuse (battery life is a great one) to go back to Apple.
And the funny thing is....she doesn't care about the app tray like most of us Android users lol
Let's see how this pans out!
tiguy99 said:
My wife just got her Honor 8 today. It's on Marshmallow. Mine is on the latest Nogat. Each update killed my battery life not significantly but noticably. I can relate to you wanting to downgrade.
While I never had an Honor 8 with Marshmallow, I was about to update her phone to the latest until I saw this thread and am glad I didn't. If Oreo fixes battery life issues, I'll happily update both our phones to it.
For her, this is her first Android and is coming from Apple. Last thing I wanna do is give her an excuse (battery life is a great one) to go back to Apple.
And the funny thing is....she doesn't care about the app tray like most of us Android users lol
Let's see how this pans out!
Click to expand...
Click to collapse
An older battery compared to a new one. One lasts longer, that's so crazy to think batteries might depreciate over time. ?
I bet you think you can kill your battery by leaving it plugged in too.
agraceful said:
An older battery compared to a new one. One lasts longer, that's so crazy to think batteries might depreciate over time. ?
I bet you think you can kill your battery by leaving it plugged in too.
Click to expand...
Click to collapse
?
I like this guy.
Good to see there's still a few "passionate battery life" folks left on XDA.
I was almost starting to forget how good it felt to run into another one of you.
Keep hope alive my brother!
Keep hope alive

Marshmallow vs. Nougat Battery Life

Hi. I am still on Marshmallow and am constantly being asked to update to Nougat. I am reading the battery performance / on screen time i snot as good in Nougat as it was on Marshmallow. Can you share your experience? One of the reasons I needed this phone was for battery life and I don't want to lose that.
I think mine might be less on Nougat than MM. But, I'm using different apps lately that seem to keep the phone awake more frequently. I'm easily still getting 4-6 hours of screen time from 4:30am to 10:30pm and going to bed with 25-50% battery. Again, it depends on how I used the phone during the day.
Yes, it seems a little worse than MM, but I know I have apps since switching to Nougat that tend to wake the phone more frequently.
I'm definitely not complaining about the battery life on this phone. I often go 40 hours without charging.
So you mean even if there is a difference it is minimal?
Also, do you have the US version?
Yes, US. The longest I went was 3 full days without a charge. Something like Monday 4:30am to Wednesday 10:00pm. Just shy of 9 hours screen time I think.
The difference between MM and Nougat was very little. Honestly, the UI is much better in Nougat than MM. (granted, it still needs work) Positive Nougat UI changes outweigh the battery life change.
Look at it this way... How much use time do you need a day? You should be able to still get 5-8 hours easily depending on usage.
I feel its the same, I've not fully measured it but I'm still getting from 3 to 4 days of battery after Nougat. I mainly use the phone for receiving calls, whatsapp, instagram and twitter, actually Twitter is the app that I use the most.
Right now I have 75% left and still tells me it has 3days of battery left, so that still a great battery duration
Well. I'm on board now too. And you all are right: no noticeable differences at the moment, although I did wipe cache and all data via recovery after update. Liking this phone.
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