yashsingh1/xdaforums huggingface dataset:
[Note 7 Questions & Answers] br0adband:
After I got this GS7A I did allow it to run down entirely till it shut off once, just one time and I actually got concerned because when I then plugged in the charger all I got on the display was a battery outline (the white battery icon that's hollowed out) and I was expecting the lightning-bolt symbol to appear there to indicate yes it's charging, after which it should change into the progress meter along the inside bottom of the icon.

That didn't happen.

So I sat there waiting. 5 minutes went by, then about 10 minutes, and I started to worry that perhaps I'd just killed it completely. But about 11 minutes after I plugged in the charger the lightning bolt appeared for about 10 seconds, flashing a few times, then I saw a thin green line across the bottom. Success!

But it did pretty much scare me for a few minutes at the thought of potentially ruining it by doing that so, I don't intend to ever let that happen. Your practice you mentioned of using Tasker to shut down at 5% (not a complete discharge like I did that one time) and to stop charging at 95% is a good idea and something I'm going to have to do more research into.

I've spent a lot of time over the years reading research papers at Battery University and I know that full discharge of a Li-Ion cell is a bad idea but I still ended up doing it. I was actually trying to capture a screenshot at 1% then I planned to initiate a shutdown immediately after that but taking the screenshot just killed it, oops. :)

But the idea of shutdown at maybe 4% and stopping the charging at 95% (or at least providing me with some kind of alert I can hear clearly and charge or disconnect as required) is a very good idea so thanks for mentioning that.

My research and understanding of the available info at Battery University is that it's better to do your best to not let a Li-Ion cell go below at least 30-40% charged most of the time with short periods of charging to bring it back up to the 90-95% point and, and occasionally - like maybe once a month - allow it to go deeper into the discharge state but not fully (I learned my lesson on that one) and then charge it back to full. The question is what that "full" point might be because some papers say charging Li-Ion to full capacity ruins them as time passes and other papers say it's just fine to do so occasionally - the problem is there's no absolute consensus on either method. :(

The deep discharge method once a month might work better as a method of calibrating (?!?!) but I honestly don't know for sure, not sure anyone does. But I think I'm going to start using Tasker for that 4-5% shutdown and 95% top off point on my Active, it sure can't actually hurt the device and could give me longer battery lifespan or should I say longevity as you did - that word actually seems more appropriate because most folks hear "battery lifespan" and they only understand that to mean how long it runs on a single charge which isn't the meaning I'm trying to get across.
[Note 7 Questions & Answers] Aimara:
all i can say after this incident , my knowledge of ion battery deepen and yes in case of emergency , you cant remove if its seal tight shut inside , something to consider , Samsung .
[Note 7 Questions & Answers] aengus4h:
for me, no it's not made me more wary, I always am re Li cells as there have been many failures not only in phones. I have laptops, eCigs, torches etc that all use Li cells. That said, I use the devices as "normal" but stay aware of how warm they've gotten in charge/use, try to not drop them or leave them on/in a source of external heating etc. Anything containing combustible material can go bang after all. A disposable lighter left on an iron fireplace with the fire burning goes bang very well indeed, as would one of these cells in the same circumstances ;)

I tend to top off the charge regularly since I have Qi chargers on my desk and in the car holder but never charge overnight while I sleep. I'd guess my operating capacity ranges from 100% down to maybe 30% and mainly hanging in the 60-80% range as the device tops up. SatNav tends to mean in-car the device only gathers a minor gain even over a couple hours use as the draw from the screen/cpu offsets the input from the Qi charger plate. The phone of course gets warm in this mode, hence it is set halfway down on the centre dash rather than up high and in the sun. And no I'm not always looking at it - voice guidance is very handy :)

On charge levels, I've also read a number of articles on various cell types. Typically the recommendations are that Li cells effectively eat themselves if kept at 100%, degrading and losing capacity over time. Hence its best if storing them to have them at 50-70% and not fully charged. Of course whether the phone actually takes the cell to its 100% limit or its charge management calls 100% at the 95% of cell capacity I don't know. When fully discharge has happened then yes it does seem to take longer for the charge icon to start ticking along, seen the same on the old iPad-1 I have, probably because the initial part has to be a very slow energising charge to get the cell to a point when it can accept more current and maybe the icon only shows rates above a certain current.

re the swelling cell. I've not used non-Samsung cells in my note 1/3 or S2 but have seen Sammy's cells also swell when they get to end of life. Both notes had this happen around the 18-26 month mark but not to the extent of the back popping off/open. Dramatic shortening of on-battery runtime yes, but from the outside no real visible indications that anything was up.
[Note 7 Questions & Answers] winol:
NO, LiPo, and Li ion batts are everywhere why worry about, I have had dozens of LiPo an LiOn powered devices
[Note 7 Questions & Answers] teegunn:
What about Li-On batteries though?
[Note 7 Questions & Answers] koppee1:
Hasn't changed for me either. But it has made me more wary of Samsung devices. There no way I'm getting the s8 (or note 8) no matter how great the features are. They can't even figure out what's wrong with the note 7.. Who's to say their upcoming phones won't have the same problem.
[Note 7 Questions & Answers] svache:
The only thing that worries me is that it may become even harder to get batteries and such shipped to Hawaii, it's horrible.
[Nexus 6P Q&A, Help & Troubleshooting] Wohee:
So I've had this issue for a while now, probably since spring where my phone will consistently die at around 15% Everytime instead of 1%, it will just skip from 15% to 1% then power off immediately. This happened today when I had battery saver auto enable at 25% and used it a bit more till it got around 15% and while in standby it just powered off and when I tried hitting it back on it actually did and showed 1%. During this time I made a phone call and opened hangouts for about 2 minutes and locked my phone again and about another minute later it randomly powered off again and would no longer get past the boot animation without shutting off. I don't believe this is a ROM issue since I've changed my ROM multiple times from stock to many custom ones (Marshmallow/Nougat) and the issue is present on all of them. I am currently on the latest PureNexus ROM with Franco kernel.

Only thing that would make sense is that my battery is degraded pretty badly and I just need a new battery installed. I bought my phone from Huawei and have no insurance plan so I don't know how much battery replacement would come out to be.
[Nexus 6P Q&A, Help & Troubleshooting] DjCalvin:
I've had the same issue since 7 hit. beyond frustrating.
[Nexus 6P Q&A, Help & Troubleshooting] flex360:
i had that issue before too. i did a clean factory reset and the issue went away
[Nexus 6P Q&A, Help & Troubleshooting] Wohee:
Well I've done full wipes (system,cache,internal,everything) and have gone through multiple roms stock, purenexus, weta, etc and it's been present in each. It does feel like it started happening once i switched to Nougat but I couldn't remember exactly. Might try a marshmallow rom and see if it's any different since I haven't ran marshmallow since Android N came out for beta.
[Nexus 6P Q&A, Help & Troubleshooting] Chengbyarmbar:
Installed 7.1.1 still happens.

https://imgur.com/a/I6vbZ
[Nexus 6P Q&A, Help & Troubleshooting] ACastanza:
I've also had this happen multiple times. Not since I wiped to get the Google Assistant.
[Nexus 6P Q&A, Help & Troubleshooting] voidAbdulrhman:
Hi, did you find out any solution?
[Nexus 6P Q&A, Help & Troubleshooting] murphyjasonc:
I have this issue also but it happens randomly. It started when I installed Nougat.
[Nexus 6P Q&A, Help & Troubleshooting] DubelBoom:
I have that too, even after I've flashed a full system image of 7.1.1 DP (used the flash all script, so including everything). Very annoying...
[Nexus 6P Q&A, Help & Troubleshooting] jaburgoa:
same here. did marshmallow help at all? i'm about to go that route, lock boot loader, etc.
[Nexus 6P Q&A, Help & Troubleshooting] FR34K-B1B0:
Root if you didn't, then do a battery calibration

Hopefully this solves the issue
[Nexus 6P Q&A, Help & Troubleshooting] DimICE:
I have this issue too. Battery unpredictable drops to 0% at 10%-20% and phone switches off.
[Nexus 6P Q&A, Help & Troubleshooting] mr.notsotech:
I've had this issue before. I did a couple of things so not so sure what fixed it. I installed ex kernel. And tried the different Cpu settings on the Interactive Governor. Ghostpepper is the one I'm currently on. No idea what fixed it. But my phone did that same thing twice before I swapped to a different kernel.

---------- Post added at 05:01 AM ---------- Previous post was at 04:52 AM ----------

I think its more or less your cpu not liking any of the settings. Maybe making it scale down to low to fast or not letting it scale up. I'm not so sure but I think thats what it is. I also doubt any battery calibration apps do much. If I remember right all they do is erase your battery history. If anything it might be bad to use those apps. To each his own tho. I guess you guys can try those apps.
[Nexus 6P Q&A, Help & Troubleshooting] Koragg618:
This apparently happens if you have auto battery saver enabled. Disable it and you should've have the issue.

Fun fact: if you select whatever percentage in the auto-mode, it will die at that percentage.
[Nexus 6P Q&A, Help & Troubleshooting] dj_rene:
I got the same issue but randomly after upgrade to 7.
[Nexus 6P Q&A, Help & Troubleshooting] hawkswind1:
That makes sense. My was battery saver was set to 10% which is when my phone would shut down. What fixed it for me was dirty flashing the rom. But I bet it only fixed it because it turned off battery saver.

On the other hand, I guess it does a great job saving battery this way. Best battery saver ever.
[Nexus 6P Q&A, Help & Troubleshooting] Jammol:
Mine and my wife's are hardware related. RMA'd both of them. Her's is a 5X though and would turn back on after about 20-30 seconds by itself after it turned off. Factory reset and all that, still on MM. Spoke to Project Fi and guy had me update it to N, it did it again right after we got done doing setup and it was still in the 90s%
[Nexus 6P Q&A, Help & Troubleshooting] galaxys:
Sounds haunted! Happy Halloween :D:eek::p
[Nexus 6P Q&A, Help & Troubleshooting] Jammol:
Yeah I know right. What made me even more mad was when she told me, "oh that....that's been happening for the past 3 months!" :crying:

Update: Got the new replacement. They sent me a brand new one!!!
[Nexus 6P Q&A, Help & Troubleshooting] StariX37:
I think your phones battery isn't calibrated properly. Or the Peripheral Control Board is facing issues...in getting the Battery stats.
[Nexus 6P Q&A, Help & Troubleshooting] a1exus:
I'm having same issue! drives me bonkers! any fix?
[Nexus 6P Q&A, Help & Troubleshooting] DualSportDad:
Are you guys rooted? I think chainefire just released 2.78 sr3 to address phone's shutting off at 15 or 30%
[Nexus 6P Q&A, Help & Troubleshooting] @work:
I had this issue and saw some random post somewhere about booting into fastboot and letting it sit until it actually dies. I did that until it died and the led blinked red. Now it reads correctly.
[Nexus 6P Q&A, Help & Troubleshooting] a1exus:
i tried that too, it doesn't solve issue.
[Nexus 6P Q&A, Help & Troubleshooting] @work:
Bummer. At this point our warranties will be expiring soon. I would roll it back to stock and if the issue persists get an rma and sell it off. If you bought from huawei then good luck, they don't even answer my own tickets.
[Nexus 6P Q&A, Help & Troubleshooting] DimICE:
For those, who have an issue: Once it dies, restart it in recovery and leave it there until the battery dies again. Recharge it after that and it check if issue still here..
[Nexus 6P Q&A, Help & Troubleshooting] Tb0n3:
Didn't fix mine.
[Nexus 6P Q&A, Help & Troubleshooting] IM0001:
So to sort of condense what seems to be going on with the battery issues in the Nexus world here, are all of you people with phones you've had nearly a year, or are some of you on 6 month or less old devices?

It appears like a Battery aging issue, but for so many Nexus's to have this issue appear around the same time, and act nearly the same way, shows it to be more of a firmware/update issue that got pushed out around the last MM build, and hasn't been fixed in the N 7.0 or N 7.1 builds as far as we can tell.

Really an irritating issue as it isn't consistent, though I am going to try the battery saver fix (disabling it from turning on automatically) and see if that does anything.
[Nexus 6P Q&A, Help & Troubleshooting] DjCalvin:
I have 3 different tickets for this since August..

Not a single one has been answered, and now my warranty is up.

---------- Post added at 01:19 PM ---------- Previous post was at 01:08 PM ----------

FYI: Have never had it enabled.

YMMV of course.
[Nexus 6P Q&A, Help & Troubleshooting] a1exus:
I tried both, same behaviour
[Nexus 6P Q&A, Help & Troubleshooting] DjCalvin:
I'm going through the Delete battery optimization file once fully charged, letting it drain, then recharge and see route currently (since yesterday actually)

So far I'm at 24% after 24 hours of light use. I am going to just play a youtube video to kill it then recharge.

Amazing how log the battery lasts when you pretty much ignore it except for messaging.
[Nexus 6P Q&A, Help & Troubleshooting] DjCalvin:
Yeah, no luck with this. Still dies at 15%

Huawei wont respond to tickets.. Not very happy with them at the moment.
[Nexus 6P Q&A, Help & Troubleshooting] Alekos:
I'm having the same issue. As soon as the phone hits 14%, the phone shuts off, and goes to 1% battery.

I had the phone sent in through in-warranty repair using my carrier (Rogers in Canada) - Huawei uses FutureTel to repair their phones in Canada.

The phone was gone for a week. When they sent it back, the repair file said:

-Replaced Main Board

-Replaced Component

I got the same phone back because my screen protector was still on (didnt check IMEI# but assume same)

Issue is STILL HAPPENING. This is awful. I tried going back to stock MM6.0, tried 7.0-7.1 etc, full wipes. full resets manually installing image. The thing is, before it went into repair, it would die at 22% - now it dies at 14% or 12%. Phone just shuts off, and when I turn the phone on, it's at 1% battery. I don't understand why they didn't replace the battery. The phone otherwise is in amazing condition (never dropped, its fully protected, always in my car). I am at a loss, because only thing I can do is send it in again.

I have screenshots of the battery dropping in a straight line when it gets to approx. 14%, so I guess I'll print them out and send it with the phone.

*Also, I've tried every battery calibration technique. nothing has fixed the issue. And it happens even when I have battery saver disabled. (I also tried a few custom ROM's, issue still persists)
[Nexus 6P Q&A, Help & Troubleshooting] shamps:
I am on the same boat. 14-15 percent and then straight power off. Will turn off the battery saver and see if that does something. Is there any clarity on if this is hardware or software related?
[Nexus 6P Q&A, Help & Troubleshooting] nruri:
Same issue here. Just wanted to report I am not using Battery Saver at all and getting this issue. I only noticed this issue after applying the October update, using tupacs Stock+ ROM with ElementalX kernel.

WIll try doing a complete wipe and seeing if the problem goes away. Nothing like thinking you have 20% left only to have your phone shut itself off at 15-16% :S
[Nexus 6P Q&A, Help & Troubleshooting] mattlowry:
anyone try this? it worked for me on the n6 may work for you as well

http://xdaforums.com/nexus-6/help/solution-phone-shutting-battery-empty-t3041226
[Nexus 6P Q&A, Help & Troubleshooting] nruri:
I tried to, unfortunately on the 6p we don't have the option in the bootloader. Maybe someone else can confirm?
[Nexus 6P Q&A, Help & Troubleshooting] shamps:
Confirmed, no such option in 6p.
[Nexus 6P Q&A, Help & Troubleshooting] mochamoo:
I have had my phone for a year and it recently started doing this. Using some battery apps (Accubattery, advanced battery calibration), I found that the battery had degraded by - 15%. The phone was reporting the wrong %. Battery degradation is to be expected. I calibrated the battery and it no longer shuts off at 15℅. You can read up on this at batteryuniversity.com. To the guy with a new motherboard, did they replace the battery? Am guessing not.
[Nexus 6P Q&A, Help & Troubleshooting] shamps:
Could you please elaborate how you calibrated you battery?

Thanks in advance!!
[Nexus 6P Q&A, Help & Troubleshooting] mochamoo:
I tried manually calibrating it by draining it completely, turning it off and recharging to full before turning it back on. That didn't work as it still died at 15%. I didn't want to keep doing that since I was afraid of wearing down the battery excessively. I eventually used the advanced battery calibration app from the play store. Seems to have done the trick. Note that the battery has still degraded the 15% but at least the phone now reflects the % accurately I hope.
[Nexus 6P Q&A, Help & Troubleshooting] shamps:
Thanks!! The manual steps haven't worked for me either. Will give this app a try and report back!!
[Nexus 6P Q&A, Help & Troubleshooting] morpheousrx:
OMG...My 6P has done this as well repeatedly! I hope we find an answer to this. I have 2 years of google protection on this phone so i may just call it in to them to fix. Let me know if there is a confirmed fix. Thanks to all those who participate in this thread with whatever knowledge you can provide.
[Nexus 6P Q&A, Help & Troubleshooting] zopostyle:
I think that's a firmware or software issue, everybody is having this problem. Maybe google fix it soon. Anyone knows if it has already been reported?
[Nexus 6P Q&A, Help & Troubleshooting] r1nstang:
this happened to me a coupe times. i just use the battery calibrator app in the play store and it fixes it. i cant remember if i have had to do it before since being on 7.1.1 or not. but maybe its a recuring problem. again, not positive
[Nexus 6P Q&A, Help & Troubleshooting] DjCalvin:
So even though my 6p is officially out of warranty now.. Huawei is replacing the battery as I have had multiple tickets open for the last 3 months on this.

calibration did jack. both the advanced calibration method, and the manual one..

Hopefully a new battery helps.

It seems to be happening to the earlier ones from what I can tell. Newer 6p's do not have this issue, even on 7.11
[Nexus 6P Q&A, Help & Troubleshooting] mochamoo:
Of course older ones will show the symptom sooner than newer ones. Degradation to the point that you notice it comes with use. Appears to be a little more than 1% a month. Glad you are able you get yours replaced.
[Nexus 6P Q&A, Help & Troubleshooting] DjCalvin:
What bothered me was that it was like a switch... one day it just started powering off the second it hit 14% (9 months in?).. I could watch the number go from 15 to 14 and the second it did, It would die. I could replicate it at will. Ah well, lets see how long they take to ship it back. I left my glass screen protector on, so I'm curious if it will be removed (I hope it would be as that would be a sign they replaced something in side..)

jotted down serial numbers, mac addresses etc... JUST to see what they replace.. as Ive seen a report of them replacing a system board, but nothing actually changed. (you can rewrite the serial number, but the MAC should change)
[Nexus 6P Q&A, Help & Troubleshooting] mochamoo:
Mine was doing the same. When battery was at 0 the phone thought it still had 15%. Using Accubattery I see that while original design capacity is 3450mAh it is now more like 2850mAh after a year's worth of average usage = 15% loss. Run this app when you get the new one to see what kind of capacity your new battery is reporting. :) Mine is out of warranty now so doubt I can get a new one but I may try still. Planned obsolescence. I am sure they want us buying new phones every year or two! Bring back removable batteries.
[Nexus 6P Q&A, Help & Troubleshooting] eregev:
Bought mine on swappa. Experiencing the same issues. I put the IMEI to Huawei and it says mine is still under warranty, would I be able to get an RMA?
[Nexus 6P Q&A, Help & Troubleshooting] Asura24:
The only time I saw this happening was with my old S2, in the end it was hardware problem and it was probably caused by me using a old alcatel charger side the one that come which the phone was dead.

Try flashing stock 6.0 and charging with the pc or another charger made that solves it.
[Nexus 6P Q&A, Help & Troubleshooting] a1exus:
My phone died around 15%, I went to fastboot mode, let it drain, then connected power, boot my phone and it showed me that I have 16% already..
[Nexus 6P Q&A, Help & Troubleshooting] inspectahso:
This had been happening to mine recently too. It hit 15% last night, died, I turned it back on, booted to home screen and died again. I tried to boot again and it just stuck on boot logo.

I tried a dirty flash in recovery, didn't fix it.

Ended up wiping all but internal storage, reflashed ROM, restored apps via titatium backup. Let it drain after a full charge and it no longer dies at 15%.

Seems a clean flash sorted my issue even though I did a clean flash on it originally. Maybe it was because I updated the vendor and flashed the ROM one after another first time round?

Running benzorom, 7.1.1, latest vendor and SuperSU.
[Nexus 6P Q&A, Help & Troubleshooting] mochamoo:
Post #40

Sent from my Pixel XL
[Nexus 6P Q&A, Help & Troubleshooting] inspectahso:
What about it?

My phone was fine until I upgraded to 7.1.1, as soon as I upgraded it started cutting out at 15%.

IMO this is something more than battery degradation, especially with it happening to so many users around the same time. If it was degradation why didn't my battery calibrate during my upgrade? Why did it decide to on my second flash?

The only difference between the 2 flashes was first time I flashed latest vendor image then ROM straight after. I'm trying to give as much info so we can narrow down the cause. I don't think battery degradation is the cause although I could be wrong.
[Nexus 6P Q&A, Help & Troubleshooting] mochamoo:
The info is provided for those seeking answers. Couldn't say why your battery didn't calibrate the first time (maybe that was a bug with dp1) but glad that you are good now.

I would bet that if you used Accubattery you would find a decrease in battery health by approx 15%. Most of the time you wouldn't notice the small incremental loss month to month but it is guaranteed to happen depending on how you use/charge your phone. See http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries if you want more info.

I just updated to dp2 so will see how that goes for a few days.
[Nexus 6P Q&A, Help & Troubleshooting] inspectahso:
I'll have a look to see if my battery is reporting any signs or degradation but I still find it odd that its happening to so many users at the exact same time.
[Nexus 6P Q&A, Help & Troubleshooting] DjCalvin:
So apparently Huawei got my phone yesterday.. Fixed whatever they needed to fix, and it's already on it's way back to me. A 1 day turnaround? Why do I have a hard time believing that?