Develop Bugs

reset battery stats of a wp7 device

Note : involves hard resetting device and loss.of data
1) fully drain the battery. Make sure the phone cannot turn on
2) hold the volume up and down buttons, connect to charger and turn on the charger . U will get a white screen . Press vol down to hard reset
3) charge the phone till led is green
4) still on charger , press and hold the vol up , down again turn off the phone the phone will restart again with the white screen, do a hard reset
Note that u have to do this this in a continuous sequence , so always have the power socket turned on as it makes the job easier .
If u missed going to the white screen, let the phone boot normally and repeat again when the led light is green

Its 21 hours and I am on 31% with mild usage, battery saver on
Medium brightness.
Location , BT off
2 live accounts

is there no other way to reset the stats?

bilbo_b said:
is there no other way to reset the stats?
Click to expand...
Click to collapse
don't think so
the battery indicator problem is cause by the os reading the full charge incorrectly .

Magpir, remember, each another thread you create regarding batteries, resetting, formatting them, the bunny dies!

Snake. said:
Magpir, remember, each another thread you create regarding batteries, resetting, formatting them, the bunny dies!
Click to expand...
Click to collapse
He definitely should be banned for these dangerous and useless "advises". He is "battery maniac" - never listen to other or just to common sense and still trying, trying, trying...
Let's everybody report to moderator to stop this guy.

Reported..

Why get him banned? It's not like he is hurting you in any way. He is sharing what he has found and like with all hacking advice it's the readers choice to take the risks on thier own device. If you don't like what he is saying don't listen.

I am on my 2nd full charge the battery is holding great

This is tell the os the correct values for 0% and 100%

voluptuary said:
Why get him banned? It's not like he is hurting you in any way. He is sharing what he has found and like with all hacking advice it's the readers choice to take the risks on thier own device. If you don't like what he is saying don't listen.
Click to expand...
Click to collapse
He found NOTHING (because he is technically unskilled and has no idea how battery charge works in WinCE, what is the "battery controller" and how it works etc.) but some of his "advices" (like keep battery in refrigerator or do a lot of hard resets or do some senseless registry changes) can hurt unsophisticated newbies. So I consider it's my duty.
XDA is a forum for developers, not for "magical rituals of voodoo shamans"...

sensboston said:
.... XDA is a forum for developers, not for "magical rituals of voodoo shamans"...
Click to expand...
Click to collapse
^--This made me LOL
I see what you are saying, although I still don't agree about the banning. If someone is dumb enough to do some of the dumb things they might read here then well serves them right.

sensboston said:
He definitely should be banned for these dangerous and useless "advises". He is "battery maniac" - never listen to other or just to common sense and still trying, trying, trying...
Let's everybody report to moderator to stop this guy.
Click to expand...
Click to collapse
His method may be unnecessary and the results debatable, but I would really hope a couple of resets and fully charging the battery wouldn't be dangerous. If so there would be an awful lot of people with WP7 phones burning their houses down.
Li-ion batteries have a chip in them that will disable the battery if the voltage gets too high or low, and the normal procedure for charging one watches the voltage and current to make sure it does not overcharge. The battery stats are used to try and give you an accurate reading of how much power is left, but it shouldn't affect how it charges.
Short of modifying the kernel to continue trickle charging past 100% (stupid IMO but yes "SBC" kernels exist-and there have been burnt batteries), the best you can do is what was recommended by HTC. Wait until your phone is fully charged and the light turns green, then unplug it for 30-60 seconds and plug it back in until the light turns green again. After once or twice unplug it and leave it unplugged until the battery dies and the phone turns off. Do that a few times and it'll reconfigure the battery stats. You can also use that trick of unplugging for a few seconds before charging more to top it off if it's been at 100% and on the charger for awhile.
See: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

xHausx said:
His method may be unnecessary and the results debatable, but I would really hope a couple of resets and fully charging the battery wouldn't be dangerous. If so there would be an awful lot of people with WP7 phones burning their houses down.
Li-ion batteries have a chip in them that will disable the battery if the voltage gets too high or low, and the normal procedure for charging one watches the voltage and current to make sure it does not overcharge. The battery stats are used to try and give you an accurate reading of how much power is left, but it shouldn't affect how it charges.
Short of modifying the kernel to continue trickle charging past 100% (stupid IMO but yes "SBC" kernels exist-and there have been burnt batteries), the best you can do is what was recommended by HTC. Wait until your phone is fully charged and the light turns green, then unplug it for 30-60 seconds and plug it back in until the light turns green again. After once or twice unplug it and leave it unplugged until the battery dies and the phone turns off. Do that a few times and it'll reconfigure the battery stats. You can also use that trick of unplugging for a few seconds before charging more to top it off if it's been at 100% and on the charger for awhile.
See: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Click to expand...
Click to collapse
since when hard resetting and charging spoils the battery?
hello there.
after i have done this my battery lasts longer than before

Magpir said:
since when hard resetting and charging spoils the battery?
It shouldn't any more than normal wear and tear.
hello there.
after i have done this my battery lasts longer than before
Click to expand...
Click to collapse
It shouldn't any more than the normal wear and tear. The extremes from being fully charged or completed discharged can cause it to wear faster, but if you want to reset your battery stats try just fully charging and then leaving it unplugged until it powers down. The reset may not be needed.

xHausx said:
His method may be unnecessary and the results debatable, but I would really hope a couple of resets and fully charging the battery wouldn't be dangerous. If so there would be an awful lot of people with WP7 phones burning their houses down.
Li-ion batteries have a chip in them that will disable the battery if the voltage gets too high or low, and the normal procedure for charging one watches the voltage and current to make sure it does not overcharge. The battery stats are used to try and give you an accurate reading of how much power is left, but it shouldn't affect how it charges.
Short of modifying the kernel to continue trickle charging past 100% (stupid IMO but yes "SBC" kernels exist-and there have been burnt batteries), the best you can do is what was recommended by HTC. Wait until your phone is fully charged and the light turns green, then unplug it for 30-60 seconds and plug it back in until the light turns green again. After once or twice unplug it and leave it unplugged until the battery dies and the phone turns off. Do that a few times and it'll reconfigure the battery stats. You can also use that trick of unplugging for a few seconds before charging more to top it off if it's been at 100% and on the charger for awhile.
See: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Click to expand...
Click to collapse
sorry though u cant do this with wp7 phones. i beleive its for android

Magpir said:
sorry though u cant do this with wp7 phones. i beleive its for android
Click to expand...
Click to collapse
The custom kernels are not available, but everything else should be the same or similar.

xHausx said:
The custom kernels are not available, but everything else should be the same or similar.
Click to expand...
Click to collapse
firstly its not the same, u cant charge wp7 phone when its off
the battery problems in wp7 phones especially hTC is well documented

Magpir said:
firstly its not the same, u cant charge wp7 phone when its off
the battery problems in wp7 phones especially hTC is well documented
Click to expand...
Click to collapse
Well, you can plug it in and turn it on to charge then.
If you are wanting to allow charging while it's turned off I know how Android and iOS accomplish it, but I doubt it would be easy to do on a WP7 device.

xHausx said:
Well, you can plug it in and turn it on to charge then.
If you are wanting to allow charging while it's turned off I know how Android and iOS accomplish it, but I doubt it would be easy to do on a WP7 device.
Click to expand...
Click to collapse
there is no way u can do this on wp7 phone

[Q] Inc consumes battery when turned off

tldr: My Incredible drains battery when turned off :-/
I have an HTC Droid Incredible that I use for testing my developed apps, and for playing around with people's roms, and I have found an odd issue with it. I can charge up the battery and use it for hours and hours and it consumes what I would consider a normal amount of charge, but when I turn it off, it still consumes battery charge. I'll charge it to 100% and disconnect the charger, hold the power button and select Power Off, and when I turn it on the next day the battery is very depleted. Yesterday I did this, and this morning about 16 hours later, I turned it on to see a 23% charge. If I leave it for more than a couple days, it won't even turn on at all and I have to charge it again before I can do anything with it.
I've tested this over the past few weeks with two separate batteries (one used, one brand new), and the same thing happens with each battery. It's definitely the phone and not the battery, because I have taken the batteries out completely, waited a few days, and they stay near 100% charge.
Some history on this phone:
I got this phone from a friend in a semi-working state. I couldn't root, s-off, or really do anything with it, so I did a factory reset, messed with it for a while, and finally decided to follow the steps in this thread to "unlock,downgrade,and achieve s-off with htcDev". This has allowed me to mess with roms, etc, so I have installed a couple, and now have "inc-eng 4.1.1 RC2" installed from this thread, and this kernel: "[email protected] #64 Mon Sep 3 18:55:57 EDT 2012"
The issue at hand however was happening before I even had it in my hands, as my friend described the same thing happening to him (he did not mess with rooting, roms, etc).

BipolarMike said:
tldr: My Incredible drains battery when turned off :-/
I have an HTC Droid Incredible that I use for testing my developed apps, and for playing around with people's roms, and I have found an odd issue with it. I can charge up the battery and use it for hours and hours and it consumes what I would consider a normal amount of charge, but when I turn it off, it still consumes battery charge. I'll charge it to 100% and disconnect the charger, hold the power button and select Power Off, and when I turn it on the next day the battery is very depleted. Yesterday I did this, and this morning about 16 hours later, I turned it on to see a 23% charge. If I leave it for more than a couple days, it won't even turn on at all and I have to charge it again before I can do anything with it.
I've tested this over the past few weeks with two separate batteries (one used, one brand new), and the same thing happens with each battery. It's definitely the phone and not the battery, because I have taken the batteries out completely, waited a few days, and they stay near 100% charge.
Some history on this phone:
I got this phone from a friend in a semi-working state. I couldn't root, s-off, or really do anything with it, so I did a factory reset, messed with it for a while, and finally decided to follow the steps in this thread to "unlock,downgrade,and achieve s-off with htcDev". This has allowed me to mess with roms, etc, so I have installed a couple, and now have "inc-eng 4.1.1 RC2" installed from this thread, and this kernel: "[email protected] #64 Mon Sep 3 18:55:57 EDT 2012"
The issue at hand however was happening before I even had it in my hands, as my friend described the same thing happening to him (he did not mess with rooting, roms, etc).
Click to expand...
Click to collapse
Maybe the battery is bad... take it out of the phone at 100 and leave it overnight and see what happens life wise
Sent from my EPAD using xda app-developers app

zachf714 said:
Maybe the battery is bad... take it out of the phone at 100 and leave it overnight and see what happens life wise
Sent from my EPAD using xda app-developers app
Click to expand...
Click to collapse
Thanks, but I did test that, with both of the batteries I have. I've left them for multiple days out of the phone, and when put back in they show 95-100%.

Maybe it's not turning off all the way.
Here's another test: turn it off, remove the battery for about a minute, then put the battery back in. Turn it on the next day and look at the battery level.
Might be a ROM issue. What ROMs have you tried this with? Have you tried stock sense and CM7?

Will do, I'll post tomorrow with my results.

If you have fastboot enabled then the phone is never really off. Try charging it then pull the battery, and put it back in the phone but leave it off. Turn it on latter and see if there was any battery loss. Fastboot is like hibernation. Its possible that some app is misbehaving and trying to sync or something while its hibernating, draining the battery.

Alrighty so yesterday I charged both batteries to 100%.
Battery A stayed out of the phone on my desk.
Battery B I removed from the phone, waited 10 seconds, and put back in the phone (I did not turn it on).
This morning, the phone (with Battery B in it) would not turn on until I charged it for a few minutes, and displayed 0% charge when it finally let me turn it on with the charger connected.
This is so weird...
Also, the rom I'm using doesn't have a fastboot option that I can find.
cmlusco said:
If you have fastboot enabled then the phone is never really off. Try charging it then pull the battery, and put it back in the phone but leave it off. Turn it on latter and see if there was any battery loss. Fastboot is like hibernation. Its possible that some app is misbehaving and trying to sync or something while its hibernating, draining the battery.
Click to expand...
Click to collapse

Okay so Battery A I put into the phone at 4pm yesterday, turned it on and found it had a 73% charge. I then turned the phone off, waited a few minutes, put the battery in and left it on my desk. This morning 12 hours later, I turned it on and it has a 25% charge.
I'm so confused... if I don't turn the phone on, how are the batteries discharging? Both batteries keep their charge when left out of the phone for a prolonged period, but discharge when in a phone that hasn't been turned on. Bah! >_<

BipolarMike said:
Okay so Battery A I put into the phone at 4pm yesterday, turned it on and found it had a 73% charge. I then turned the phone off, waited a few minutes, put the battery in and left it on my desk. This morning 12 hours later, I turned it on and it has a 25% charge.
I'm so confused... if I don't turn the phone on, how are the batteries discharging? Both batteries keep their charge when left out of the phone for a prolonged period, but discharge when in a phone that hasn't been turned on. Bah! >_<
Click to expand...
Click to collapse
Mabey there is a short in your phone somewhere. Does the battery last like normal when the phone is on, or does it also die quickly?

cmlusco said:
Mabey there is a short in your phone somewhere. Does the battery last like normal when the phone is on, or does it also die quickly?
Click to expand...
Click to collapse
I'll have to test this when i get home, but I beleieve the battery discharges at a normal rate when the phone is on.
(this is not my normal phone, just one I use for testing apps, etc. so I don't use it on a regular basis)
I'll charge one of the batteries to 100% and leave it on overnight, and post my results.

BipolarMike said:
I'll have to test this when i get home, but I beleieve the battery discharges at a normal rate when the phone is on.
(this is not my normal phone, just one I use for testing apps, etc. so I don't use it on a regular basis)
I'll charge one of the batteries to 100% and leave it on overnight, and post my results.
Click to expand...
Click to collapse
Okay I left my phone on for 18 hours in airplane mode, and it drained battery SLOWER than with the battery inserted into the phone and the phone never turned on.
So weird... I don't understand.

BipolarMike said:
Okay I left my phone on for 18 hours in airplane mode, and it drained battery SLOWER than with the battery inserted into the phone and the phone never turned on.
So weird... I don't understand.
Click to expand...
Click to collapse
Very strange. I have no clue what would cause something like that.

cmlusco said:
Very strange. I have no clue what would cause something like that.
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Click to collapse
Mine drains when all the way off 2 but not that bad... I think it may be the MotherBoard keeping power to the Nand memory so it dosen't relock and keeping power to the CPU so it can be quicker on bootup

zachf714 said:
Mine drains when all the way off 2 but not that bad... I think it may be the MotherBoard keeping power to the Nand memory so it dosen't relock and keeping power to the CPU so it can be quicker on bootup
Click to expand...
Click to collapse
I'm assuming there's no way to stop it from doing this?
It's not a huge deal, as this is a test phone I use for development, but I may be eventually selling my test phones, so I try to keep them in good working order, or get them to a decent refurbished point Plus this is a weird enough phenomenon that I figured it deserved discussion.

BipolarMike said:
I'm assuming there's no way to stop it from doing this?
It's not a huge deal, as this is a test phone I use for development, but I may be eventually selling my test phones, so I try to keep them in good working order, or get them to a decent refurbished point Plus this is a weird enough phenomenon that I figured it deserved discussion.
Click to expand...
Click to collapse
There maybe no stopping it I guess because mine does it 2 but not that fast..... Oh yeah an I think this is the 1 test phone you don't sell It has 2 many good devs

Official fix for battery problems

This is directly from HTC tech support. To recalibrate battery and HTC charger when battery rapidly or erratically discharges, this procedure clears all battery stats, coordinates and normalizes charging.
Turn off Fast Boot in settings. Power off phone.
Plug phone into HTC charger and charge for two minutes or more
While charging, hold down volume up+volume down+power button and continue holding
Phone will turn on and off repeatedly every 15 seconds or so while continuing to hold all three buttons
Keep this going for 2 minutes, then release buttons when phone is ON
Now, let phone charge fully normally (with phone either on or off--doesn't matter) and battery level reporting, charging and battery life should be normalized.
Do this every month or so to keep power system healthy--even if everything seems fine. Also, don't leave phone on charger overnight for best long term battery life (according to HTC tech support: "The first thing they tell us." This is true even though charging is supposed to turn off when battery is at 100%)
NOTE: Another potential fix for battery/charging abnormalities if this procedure fails (esp. after an OTA update when corrupted files can remain stuck in device cache partition)--clear cache partition using this method: http://forums.androidcentral.com/verizon-htc-one/315416-how-clear-cache-partition-stock-recovery-un-rooted-phone.html

Check your battery history in settings. If the 3. bar, in the middle, is always there (it's probably called "in usage", I'm on a different language so i don't know), then some app is always on and it's draining your battery. I haven't discovered which app is that yet, but I'll install battery monitor app to discover it.
When it's like that, i lose 1% per hour on standby, which is a lot, because normally during the whole i lose about 1-2%. So I kill all apps with Clean Master and then the 3. bar isn't present anymore when my phone is on standby.

And why not just let the battery die. I mean let the phone turn off and then charge it to 100%. This is the general way to calibrate the battery.
Tapatalked with my "refrigerator look" HTC one M8

As far as I'm aware Lipo batteries shouldn't be completely discharged. I have some RC helicopters and planes and each Lipo battery pack carries that warning.
Sent from my HTC One_M8 using XDA Free mobile app

andy905 said:
As far as I'm aware Lipo batteries shouldn't be completely discharged. I have some RC helicopters and planes and each Lipo battery pack carries that warning.
Click to expand...
Click to collapse
Now you're talking crazy. I'm fairly sure the same advice for NiCd and NiMH still applies, even though they're completely different technology and haven't been used in phones 15 Years.
I personally use witchcraft to keep my batteries in working order.

BenPope said:
Now you're talking crazy. I'm fairly sure the same advice for NiCd and NiMH still applies, even though they're completely different technology and haven't been used in phones 15 Years.
I personally use witchcraft to keep my batteries in working order.
Click to expand...
Click to collapse
Lipo batteries are way different than NiCd and NiMh and their chemistry is unstable to say the least. But by all means be crazy yourself and drain your battery to 0% if you feel the need.
Sent from my ASUS_T00I using XDA Free mobile app

andy905 said:
But by all means be crazy yourself and drain your battery to 0% if you feel the need.
Click to expand...
Click to collapse
I think you missed my sarcasm, I agree with you.
You can't drain the battery to 0 without going out of your way as the electronics in the battery protects it, but yeah, as soon as your phone switches off, it's time to add some charge, if not way, way before. I don't actually believe in this calibration thing people speak of.

I ran my M8 completely dry once on purpose a couple of days after purchase. I always do this at least once with every phone sometime in its lifespan.
When doing so, the phone sat at 1% charge for over an hour while I had the screen on at maximum brightness all the time and streaming music with Spotify.
Needless to say it was needed for my phone.

While using the phone, battery doesn't drain as fast.. When its in standby, somehow it drains faster..very strange
Sent from my HTC One_M8 using XDA Free mobile app

bikercr said:
This is directly from HTC tech support. To recalibrate battery and HTC charger when battery rapidly or erratically discharges, this procedure clears all battery stats, coordinates and normalizes charging.
Turn off Fast Boot in settings. Power off phone.
Plug phone into HTC charger and charge for two minutes or more
While charging, hold down volume up+volume down+power button and continue holding
Phone will turn on and off repeatedly every 15 seconds or so while continuing to hold all three buttons
Keep this going for 2 minutes, then release buttons when phone is ON
Now, let phone charge fully normally (with phone either on or off--doesn't matter) and battery level reporting, charging and battery life should be normalized.
Do this every month or so to keep power system healthy--even if everything seems fine. Also, don't leave phone on charger overnight for best long term battery life (according to HTC tech support: "The first thing they tell us." This is true even though charging is supposed to turn off when battery is at 100%)
NOTE: Another potential fix for battery/charging abnormalities if this procedure fails (esp. after an OTA update when corrupted files can remain stuck in device cache partition)--clear cache partition using this method: http://forums.androidcentral.com/ve...partition-stock-recovery-un-rooted-phone.html
Click to expand...
Click to collapse
Tried this. It did seem to work for me. I was skeptical, but I definitely feel like it fixed the erratic battery behavior I was seeing.
Sent from my HTC One_M8 using XDA Premium 4 mobile app

dannejanne said:
I ran my M8 completely dry once on purpose a couple of days after purchase. I always do this at least once with every phone sometime in its lifespan.
When doing so, the phone sat at 1% charge for over an hour while I had the screen on at maximum brightness all the time and streaming music with Spotify.
Needless to say it was needed for my phone.
Click to expand...
Click to collapse
has this process worked for you for every device you've owned? I'm getting horrible standby drain on my m8. Wifi on, location, autosync, bluetooth, nfc all disabled. in a span on 9 hours I lost 10% close to 11. the only thing I can think of is I haven't greenified anything, but I shouldn't have to..
and like another user said I seem to get better battery life when it is in use then when it is in deep sleep

1% battery drain per hour is about normal. If you don't want out to drain turn it off
Sent from my HTC One_M8 using XDA Premium 4 mobile app

JayRolla said:
1% battery drain per hour is about normal. If you don't want out to drain turn it off
Sent from my HTC One_M8 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
it shouldn't be if you disable everything.

suprtrukr425 said:
Tried this. It did seem to work for me. I was skeptical, but I definitely feel like it fixed the erratic battery behavior I was seeing.
Sent from my HTC One_M8 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
According to HTC tech support, the battery in the One has a chip that tracks charging/discharging. This chip's memory is cleared via the specific steps I outlined (both volume keys and power button cycling). It's important to do this process while the phone is plugged into the HTC charger that came with the phone--not an aftermarket charger. Apparently, the charger chip is also affected by this reset.
I performed this reset procedure a few times, cleared the device cache, did a data reset, and also installed the new OTA. None of these steps completely corrected my erratic battery behavior. I'm sending the phone back to HTC for a replacement. In researching this, it appears that after the prior KitKat OTA several weeks ago, a number of folks have complained of the same power problems on various Android boards and I believe HTC is aware of the problem.

Shudder123 said:
it shouldn't be if you disable everything.
Click to expand...
Click to collapse
Its an electronic device that is running. Should it be magic and use no power. At 1% per hour thats 100 hours of standbye time which is not bad. I agree you should be maybe a little less with all location services, data, 3g, wifi, bt all disabled but remember. Its on and using power, it has to use something.

Hi there, i have a problem with my battery, when the percentage is 15% the phone starts discharging very quickly, like dies in 1 minute. From full charge to 15% discharge seems legit. In your opinion can be an hardware or software problem.

Hy, my phone dies at about 15-20% but when I plug it in the charger it says 20% and charging.... I turn it on and the same thing happen...
ANy help on how to fix this problem?
Thank you

CrazyCypher said:
Hy, my phone dies at about 15-20% but when I plug it in the charger it says 20% and charging.... I turn it on and the same thing happen...
ANy help on how to fix this problem?
Click to expand...
Click to collapse
Did you try the procedure described in the first post, for which this thread is about?

Question,
I was trying to follow the procedure for battery reset. I did this in the past when I got the phone. Since then I I unlocked bootloader, rooted and S-Off. Now when I try the volume up/down + power, after a few cycles of the logo screen it goes to bootloader screen. Cant' get it to go the 2 minutes mentioned. Any ideas?

Cremnomaniac said:
Question,
I was trying to follow the procedure for battery reset. I did this in the past when I got the phone. Since then I I unlocked bootloader, rooted and S-Off. Now when I try the volume up/down + power, after a few cycles of the logo screen it goes to bootloader screen. Cant' get it to go the 2 minutes mentioned. Any ideas?
Click to expand...
Click to collapse
I tried the procedure and the phone kept restarting like every 10 seconds through the process.
There is no Fast Boot option on Marshmallow, so that's out. I'm leaving the phone to charge overnight.
In my case I'm afraid there's a certain App that's creating the drain because the battery was showing 20%, then 50% while unplugged and then it died 15 minutes later while I was reading the newsfeed.
I will edit this post with the results in a couple of days.
Updated: Ok sooo, the first charge after calibration lasted about 12 hours with moderate/heavy use.
Now I recharged again and I don't understand. It has stayed at 100% for more than 15 hours!
I have Amplify and Power Saver settings for vibration and dim screen and that's it. I don't get it.
As a final note, HTC recommends doing this chickenchocking thing every month! I felt like I was killing the poor thing trying to boot. But anyway, that's my results so far. Oh, I'm using Gsam for readings.

Annoying Battery Issue

My Note 4 is 14mo old and for the last couple months it just shuts off on me even though I have plenty of power left.
I am a light user and usually have enough power for all day use. I rarely use my phone down past 10-15%. I always put my phone on the charger when I go to bed at night when I have somewhere around 20% charge left. If I notice that I might not have enough power to get me through the day I'll put it on the charger somewhere between 30 and 40%.
Lately, like tonight I got a low battery warning at 30% power while I was on the phone. Not even two minutes later it shuts off. When I turn it back on it starts to boot up but then shuts off again. When I put it on the charger it was completely dead. This only happens 3 or 4 times a month but it's annoying because often it happens at the most inconvenient time.
I've also had it shut off and then when I put it on the charger it starts charging at 28% power.
Please let me know what may be going on here and a solution...
Thanks...

tomfrazier said:
My Note 4 is 14mo old and for the last couple months it just shuts off on me even though I have plenty of power left.
I am a light user and usually have enough power for all day use. I rarely use my phone down past 10-15%. I always put my phone on the charger when I go to bed at night when I have somewhere around 20% charge left. If I notice that I might not have enough power to get me through the day I'll put it on the charger somewhere between 30 and 40%.
Lately, like tonight I got a low battery warning at 30% power while I was on the phone. Not even two minutes later it shuts off. When I turn it back on it starts to boot up but then shuts off again. When I put it on the charger it was completely dead. This only happens 3 or 4 times a month but it's annoying because often it happens at the most inconvenient time.
I've also had it shut off and then when I put it on the charger it starts charging at 28% power.
Please let me know what may be going on here and a solution...
Thanks...
Click to expand...
Click to collapse
I had the exact same issue. I had 2 different batteries shutting off at 20-30%!.... Replacing the battery to a brand new one simply fixed it!.... if you are going to order one online try to avoid unknown brands . Also, pay attention there are some fake Samsung batteries claiming to be authentic.
Also if you still have warranty, contact Samsung and they should send you a new one. That's what i also did.

So you think its the battery and not software related? I was thinking software issue because I don't abuse my battery by running it dead and it's an intermittent problem.
I know that the life cycle of Li-ion is greatly reduced by repeated draining to below 10% (my kid's phones suffer from that. Seems like they can't make a battery last more than 6mo) but I've never had a phone battery go bad on any of MY phones including my old Note 2 even after two years. Maybe I just have a bad battery?

tomfrazier said:
So you think its the battery and not software related? I was thinking software issue because I don't abuse my battery by running it dead and it's an intermittent problem.
I know that the life cycle of Li-ion is greatly reduced by repeated draining to below 10% (my kid's phones suffer from that. Seems like they can't make a battery last more than 6mo) but I've never had a phone battery go bad on any of MY phones including my old Note 2 even after two years. Maybe I just have a bad battery?
Click to expand...
Click to collapse
Doesn't matter whether you abuse the battery or not. Some batteries just go bad faster than others. I also think it's your battery.
A factory reset without restoring apps will rule out a software issue though, but since we can't root, it likely isn't anything messing with your battery percent unless it's just an app draining your battery. But even if it were the latter, your battery wouldn't die then start charging at 28%.
Sent from my SAMSUNG-SM-N910A using Tapatalk

Pretty sure this is an actual built in feature. Mines always died at ~20% (since the 5.1.1 update) and once plugged into a charger and rebooted all my running apps and clipboard info is still running as if the phone never died.
My battery is brand new (from warranty replacement) and it still does this so this is why I think it's a "feature" to keep you from losing data in the event of a low battery event. Just my opinion.

It's not a feature. Mine goes all the way to 0% before it dies. I once read to take out the battery, hold the power button for 30 seconds (while the battery is out), then put it back in and see if it helps. This supposedly gets rid of any residual power storage. I don't know if this is a placebo affect by after I did that, my battery now goes all the way to 0 before dieing.

jack man said:
It's not a feature. Mine goes all the way to 0% before it dies. I once read to take out the battery, hold the power button for 30 seconds (while the battery is out), then put it back in and see if it helps. This supposedly gets rid of any residual power storage. I don't know if this is a placebo affect by after I did that, my battery now goes all the way to 0 before dieing.
Click to expand...
Click to collapse
Not exactly a placebo, but not sure if it truly helps. Doing this would clear all electricity stored in any capacitors in the phone. I'm just not sure how this helps.
And my battery goes all the way down to 0% too. It's not normal for the phone to due at any other % (except maybe 1%).
Sent from my SAMSUNG-SM-N910A using Tapatalk

How I fixed my battery life [Calibration][NoRoot]

So I am on the WWE of Nougat, version 2.41.401.41. I was getting abysmal battery life, at about 2h30m screen on time, without doing anything special (just browsing, some social media, etc.).
Also, AccuBattery was showing the battery capacity at 2300 MhA, which I found quite impossible for a one year old device.
I suspected that my battery was badly calibrated. What I did is what is described in this thread, slightly modified:
Charge the phone while turned on up to 100%.
Remove the charger and reboot the phone. Upon reboot, the battery will have dropped at about 96-98%.
Reconnect the charger and charge again up to 100%.
Remove the charger again and reboot the phone. This time, the battery will have dropped again, but not as much as the first time.
Repeat steps 2 and 3 until after reboot your battery remains at 100% or at least 99% (depends on how freaky you want to get).
After doing the above I have been getting about 3h30m to 4h00m screen on time and AccuBattery is showing about 2700 MhA battery capacity.
Seems that HTC has really messed up the battery calibration on the 10. Hope this little "trick" helps you as much as it did help me.
----------------------
A follow up to this, here is a reply I got from HTC support, regarding battery:
* For battery calibration :
please unplug the phone from charger - turn off the phone device - press on Volume up + Volume down - Power on button all at the same time till the phone started on , please check the battery indicator ,then follow as below :
1. Restart your device
2. Turn on Airplane Mode
3. Connect your device to the charger, and charge it fully
4. Set screen brightness to Max.
5. Set Screen Time out to never.
6. Dial *#*#3424#*#*, choose battery and Charging run down test, and follow the instructions.
If the device loses more than 40% of battery in an hour, then send your device to the repair center
Click to expand...
Click to collapse

errikosd said:
So I am on the WWE of Nougat, version 2.41.401.41. I was getting abysmal battery life, at about 2h30m screen on time, without doing anything special (just browsing, some social media, etc.).
Also, AccuBattery was showing the battery capacity at 2300 MhA, which I found quite impossible for a one year old device.
I suspected that my battery was badly calibrated. What I did is what is described in this thread, slightly modified:
Charge the phone while turned on up to 100%.
Remove the charger and reboot the phone. Upon reboot, the battery will have dropped at about 96-98%.
Reconnect the charger and charge again up to 100%.
Remove the charger again and reboot the phone. This time, the battery will have dropped again, but not as much as the first time.
Repeat steps 2 and 3 until after reboot your battery remains at 100% or at least 99% (depends on how freaky you want to get).
After doing the above I have been getting about 3h30m to 4h00m screen on time and AccuBattery is showing about 2700 MhA battery capacity.
Seems that HTC has really messed up the battery calibration on the 10. Hope this little "trick" helps you as much as it did help me.
Click to expand...
Click to collapse
Hey, so one month-ish on, how has the battery life been? Has it stayed at 3h30-4h00 screen time or has it dropped again like before?

Devzz said:
Hey, so one month-ish on, how has the battery life been? Has it stayed at 3h30-4h00 screen time or has it dropped again like before?
Click to expand...
Click to collapse
Depends on the usage really. I have given up on measuring the SOT, I just plug in every day at night. But has been pretty stable, gets me through the day.

errikosd said:
Depends on the usage really. I have given up on measuring the SOT, I just plug in every day at night. But has been pretty stable, gets me through the day.
Click to expand...
Click to collapse
Fair enough, it's a bit pointless at this point to be honest. Does the phone reboot randomly below 50/60% or has calibration fixed that issue? That's the biggest gripe I have with the Nougat update at the moment. If calibration fixes it, I'm gonna do it now! If not, do you reckon another kernel fix it?
Thanks for replying!

Devzz said:
Fair enough, it's a bit pointless at this point to be honest. Does the phone reboot randomly below 50/60% or has calibration fixed that issue? That's the biggest gripe I have with the Nougat update at the moment. If calibration fixes it, I'm gonna do it now! If not, do you reckon another kernel fix it?
Thanks for replying!
Click to expand...
Click to collapse
I have never had that issue, before or after "calibration". I am using stock ROM with ElementalX kernel (stock settings in Aroma).

errikosd said:
I have never had that issue, before or after "calibration". I am using stock ROM with ElementalX kernel (stock settings in Aroma).
Click to expand...
Click to collapse
Turns out it is a common issue:
https://forum.xda-developers.com/htc-10/help/random-shut-boot-loops-t3690547. Seems to be software related hence my initial question!

i have 300 mah battery capacity on my htc 10 , happened overnight ...

A follow up to this, here is a reply I got from HTC support, regarding battery:
* For battery calibration :
please unplug the phone from charger - turn off the phone device - press on Volume up + Volume down - Power on button all at the same time till the phone started on , please check the battery indicator ,then follow as below :
1. Restart your device
2. Turn on Airplane Mode
3. Connect your device to the charger, and charge it fully
4. Set screen brightness to Max.
5. Set Screen Time out to never.
6. Dial *#*#3424#*#*, choose battery and Charging run down test, and follow the instructions.
If the device loses more than 40% of battery in an hour, then send your device to the repair center
Click to expand...
Click to collapse

Did that work for you?

For me the htc tool is showing like 6-7%discharge over the one hour...
But if I I use Spotify or any other online/local music app, this can't be true...
Seems to be a software problem, nothing to do with nougat or oreo, nor with firmware version.
Trying the "manual" calibration tomorrow.
About the 40% rule... I already had a support guy say it only needs to be 25%...
Still my battery is far far away from that... Sadly, would love to send it in to have a fresh battery...

errikosd said:
A follow up to this, here is a reply I got from HTC support, regarding battery:
Click to expand...
Click to collapse
houston_ said:
For me the htc tool is showing like 6-7%discharge over the one hour...
But if I I use Spotify or any other online/local music app, this can't be true...
Seems to be a software problem, nothing to do with nougat or oreo, nor with firmware version.
Trying the "manual" calibration tomorrow.
About the 40% rule... I already had a support guy say it only needs to be 25%...
Still my battery is far far away from that... Sadly, would love to send it in to have a fresh battery...
Click to expand...
Click to collapse
from my understanding you are referring to the 40% in the quoted text
so when you do the test it should only lose about 25% in one hr like the HTC rep said to you instead of the 40 quoted by the other forum user?

Nolia said:
from my understanding you are referring to the 40% in the quoted text
so when you do the test it should only lose about 25% in one hr like the HTC rep said to you instead of the 40 quoted by the other forum user?
Click to expand...
Click to collapse
Right, I am in contact with the HTC support using their FB chat.
Last time I asked, still on HTC One m7, it was around 40% for me too.
This time they said it should not drop below 75%.
To be sure you should ask the support yourself, maybe it depends on the country as well?

Battery
Nolia said:
from my understanding you are referring to the 40% in the quoted text
so when you do the test it should only lose about 25% in one hr like the HTC rep said to you instead of the 40 quoted by the other forum user?
Click to expand...
Click to collapse
Have you tried wiping the cache partition, my battery was 100% & went to 81% and held its charge for much longer, it's a short way of clearing your battery stats

Another trick
I found an alternate trick and it looks like it's a bit more effective (at least for me):
Basically following OP's instructions: charging it to 100% then turn the phone off. But instead of restarting, Turn OFF the phone then hold power+volume down until the backlight of the back and app switcher buttons flashes twice then let go. Then turn on the phone while holding volume up. I think this helps force a battery recalibration every time.
When I did it once I got to 78% then the second restart 55%. I'm currently charging for the 3rd restart to see if I can get better than that. Previously when I tried OP's method a few days earlier I got 78% on the first restart , 98% on the second, and 99% for every time I tried after that.

Draika said:
I found an alternate trick and it looks like it's a bit more effective (at least for me):
Basically following OP's instructions: charging it to 100% then turn the phone off. But instead of restarting, Turn OFF the phone then hold power+volume down until the backlight of the back and app switcher buttons flashes twice then let go. Then turn on the phone while holding volume up. I think this helps force a battery recalibration every time.
When I did it once I got to 78% then the second restart 55%. I'm currently charging for the 3rd restart to see if I can get better than that. Previously when I tried OP's method a few days earlier I got 78% on the first restart , 98% on the second, and 99% for every time I tried after that.
Click to expand...
Click to collapse
Did you unplug the phone before turning it off or did you keep it plugged in?

have you guys tried the Chargie app? It's coupled with a hardware device that limits charging to the phone at your desired level and saves the battery long term.

Unfortunately none of the above did the trick for me. Still, the phone randomly (once in a while) goes to loop when 15 to 20 percent of charge is remaining and won't stop before I plug in a charger. /sad face/

errikosd said:
* For battery calibration :
please unplug the phone from charger - turn off the phone device - press on Volume up + Volume down - Power on button all at the same time till the phone started on , please check the battery indicator ,then follow as below :
1. Restart your device
2. Turn on Airplane Mode
3. Connect your device to the charger, and charge it fully
4. Set screen brightness to Max.
5. Set Screen Time out to never.
6. Dial *#*#3424#*#*, choose battery and Charging run down test, and follow the instructions.
If the device loses more than 40% of battery in an hour, then send your device to the repair center
Click to expand...
Click to collapse
Well the test consumed around 50% of my battery. The issue that started around a month ago is that my phone shuts off around 30% battery , however it won't switch on again till I plug-in the charger and when it is on , the battery is at 1%. Seems that the phones is displaying a 1% as 30% before shutting down. What should I do ?

DemonicSpirit said:
Well the test consumed around 50% of my battery. The issue that started around a month ago is that my phone shuts off around 30% battery , however it won't switch on again till I plug-in the charger and when it is on , the battery is at 1%. Seems that the phones is displaying a 1% as 30% before shutting down. What should I do ?
Click to expand...
Click to collapse
I had the exact same problem. I sent it to HTC and got the battery replaced.

errikosd said:
I had the exact same problem. I sent it to HTC and got the battery replaced.
Click to expand...
Click to collapse
Mind I ask how mch htc chared for this service?
Was it in US?
Thank you. :good:
Mine is currently sitting at,
according to accubattery at least:
on P - 66% capacity
on N - 75% capacity