Develop Bugs

[Q] Battery worn out?

Hello,
My desire, after:
an inability to restore nandroid backup
a possible corrupted sd card
a usb brick and inability to mount some nand partitions
and finally succeeding in fixing it, now using/running:
2.29.405.5 stock rooted rom
a new sd card (samsung 16GB class 6)
clockworkmod 2.5.0.7
s-off
seems that has battery issues. When it reaches below 30%, it drains a lot faster. In example few minutes ago, the battery was below 30% level and after sending a couple of sms messages the phone, without the "Connect the charger" indication shut down. Not even the battery icon was red.
What should I do?
After flashing the above ROM I ran an app called battery calibration (could this be the culprit?).
I haven't experienced such problems before the whole mess mentioned above.
Thank you for your time.

Well, it seems to me like a "classic" battery meter calibration issue.
TVTV said:
In order to calibrate the battery meter - FYI the battery itself cannot be calibrated, as Li-Ion batteries have a very low memory compared to old Ni-Cd etc. batteries - you have to go through the following procedure:
1) charge the battery to 100%;
2) let the battery discharge until the phone shuts itself down;
3) plug the wall charger into the phone, boot the phone up then charge the battery to 100% without interruptions.
If the above procedure does not yield the expected results, you can try fully charging the phone (LED showing green) with it completely turned off (after completely draining it). Again, the charging procedure should not be interrupted.
Source: personal experience - had to do this twice after installing new ROMs, as the phone was shutting down at ~14% (working like a charm now).
Regarding the matter of battery wear because of complete discharges, Li-Ion batteries do indeed have a lower cycle count than old-school batteries, but the standard charge/discharge number a Li-Ion battery can take is ~350, so you can't damage the battery pack by doing a full cycle per month (required to keep the battery meter accurate).
Good luck!
Click to expand...
Click to collapse

Did this work you mate? I have the same issue with my year old batter now... the phone shuts down @ 40% without any warning... and when I charge it, it starts from 0% and as soon as it hits the 58% mark, it jumps to 100% by itself... and i cant seem to figure out what the hell could I do to fix it... I tried calibrating the battery using the awesome method described here http://forum.cyanogenmod.com/topic/11823-battery-calibration-thread 3 times and nothing changed...

bump bump.. i really need help on this guys... :/
Sent from the infinity and beyond...

Weird that after calibration you still get that kind of issues, does this only happen on your current ROM? I have the latest CM in my desire and everything works just fine... Maybe try another ROM if calibration doesn't work to see if it's a hardware or software issue

i actually had issues with MIUI first.. the phone randomly shut down by itself but when i turned it back on, it was perfect... then i switched back to Oxygen and while everything was fine, suddenly one day the phone died at 40% :S and from that day on the phone charges to 58% and then instantly jumps to 100%... and as soon as it gets to 40% it shuts down itself... i guess i need a new battery but i wanted to see wether i can fix this one somehow so i can use it till the new one arrives...
Sent from the infinity and beyond...

same problem
i have the same problem
my phone turns off at 20% battery
calibration does not help....
and battery is not bad - it works fine
i'm sure its the problem with calibration

kshitijgandhi said:
i have the same problem
my phone turns off at 20% battery
calibration does not help....
and battery is not bad - it works fine
i'm sure its the problem with calibration
Click to expand...
Click to collapse
phone turning off at 20% is fine mate because thats the battery guards against any damage
most of the phones ( smart phones) switch off at 20% as going lower can damage the System .

It shouldnt normally..It's supposed to work fine upto 5%

Have a look at this, it worked for me (but you need a compatible kernel, most AOSP are so)
http://forum.xda-developers.com/showthread.php?t=765609

[Q] Battery Life and Battery Reading Problems

Hi xda-dev
I'd like to ask you guys for your input on a battery issue I've been having. I know you get many a question on batteries, despite this I haven't been able to find an answer, nor anything even related to what I'm trying to fix. I'm at a point where the phone wont last a day of idle at school with it not leaving my pocket, and I don't know what I need to do to resolve this rather unique issue.
I have two S3s, and therefore two batteries. On one of the phones the screen is shattered, so I use it to charge the extra battery. To do so I wrote a tasker profile which voices the battery percentage and time charging when it detects that the screen is "on" (i.e. power button pressed). I installed the exported app factory apk to the broken S3 by swapping motherboards. This setup has been working great for me because I never had to plug my S3 in, I could simply charge one battery at home while the other was in use. That is until about 3 weeks ago now where I've begun to notice that the phone I carry with me cannot properly read the percentage of charge remaining on the battery. I believe the issue started after a return to stock rom for unlocking, or flashing leankernel. A factory reset and all caches have been cleared since.
Here are some symtoms:
It remains unable to charge the battery above ~70%, without using the charging phone,
drains very rapidly,
upon reaching 0% a reboot causes the battery to return to roughly 45%,
and finally the battery percentage may raise while the phone is not charging
the charge may sit at within the range of 1% to 3% for extended periods of time (see screenshot).
And here is some data:
Rooted
Custom Rom: CyanogenMod Version 10.1.0-RC5-d2att
Rom build number: cm_d2att-userdebug 4.2.2 JDQ39E eng.jenkins.20130607.100250 test-keys
Custom Kernel Version: [email protected] #56 Sun Jun 16 19:21:51 PDT-2013
CPU governor: ondemand
CPU Min/Max: 384/1512 MHz
Few apps installed as I just did a factory reset, with Google latitude location reporting set off.
While writing this post I swapped the batteries between the phone I use and the charging phone. The dead battery read 4% before I powered down, but when it was put into the charging phone it immediately voiced that that same battery had 81%. The battery that was removed from the charging phone was at 100%, but when the other phone booted that "charged" battery had 89%. That reading was taken when I started typing this post, at 5:45, and now 15 minutes later (6:00) the battery has lost 23% leaving it at 66. The draining phone sat idle while I wrote this post, as I am on my laptop, so that drop of 23% occurred with about 90% screen off time, (note that media scanner would be running since the phone just booted).
In the following screenshots you will notice the time is over 24 hours, this is because the phone has not held a 100% charge since then. Large direct jumps of power are either simple reboots or a battery change. Notice the graph increasing without the charging state being active. I chose not to include a bbs screenshot because the phone had just booted so there were no good reference points. Total screen on time is 4 hours 20 minutes, and 8tracks has had a CPU total of 1 hour 20 minutes with a keep awake of 2.5 hours.
Thanks for any help you can suggest.

Try using only one battery for couple of days, and see the results.

Zev.Isert said:
I have two S3s, and therefore two batteries. On one of the phones the screen is shattered, so I use it to charge the extra battery. To do so I wrote a tasker profile which voices the battery percentage and time charging when it detects that the screen is "on" (i.e. power button pressed). I installed the exported app factory apk to the broken S3 by swapping motherboards.
Click to expand...
Click to collapse
Sorry why exactly was it necessary to swap motherboards?
It sounds like some hardware on ur device is shot either the battery or something else..

atrix4nag said:
Try using only one battery for couple of days, and see the results.
Click to expand...
Click to collapse
Battery length is lasting longer now after using a single battery for a few days. I will continue to stay with one battery.
Heisenberg420 said:
Sorry why exactly was it necessary to swap motherboards?
It sounds like some hardware on ur device is shot either the battery or something else..
Click to expand...
Click to collapse
By "swap motherboards" I mean I attached one screen from one device to the other, it was necessary to install the charging app I wrote through tasker, to automate shutdown when charged, and say battery percentage when power button pressed. The matching motherboard and screen remained in their corresponding phones after that was done.

[Q] Battery drop after reboot?

I've been experiencing huge battery drops (from 10% up to 20%) after I reboot my phone. Is this a KitKat issue or is it my battery?
In the morning from 99% (after checking a few messages in the morning), I rebooted and I dropped 11% to 88%.
I think It may have been my battery giving me the huge drops. I don't seem to have this issue any more after buying a new one. :good:

I didnt found it on reboots, but i have this problem when i enter recovery. 20 minutes in recovery - i dont hace 20% of battery.

artur1131 said:
I didnt found it on reboots, but i have this problem when i enter recovery. 20 minutes in recovery - i dont hace 20% of battery.
Click to expand...
Click to collapse
Hmmm that's strange.
I've noticed it usually drops more when I leave my headphones in.

full loaded ACE 2.
reboot cost u 5%
first 10 % gone in a few minutes for heavy users and in a few hours when deepsleep !!
what i wanna say.
the first 10 % gone in a few.
after that normal drain.

I often get this, although not as bad. I usually lose 2-5% on a reboot, sometimes up to 10%. The other week I charged it to 100% when it was off, turned it on and had 92%.

so is this actually a problem or is it normal for everyone?. Mine looses 5-8% in the first couple of minutes after I unplug the charger..

It's normal.
Sent from my GT-I8160 using Tapatalk

edithswanneck said:
I often get this, although not as bad. I usually lose 2-5% on a reboot, sometimes up to 10%. The other week I charged it to 100% when it was off, turned it on and had 92%.
Click to expand...
Click to collapse
Same experience. Around 5% to 10% is lost during my reboots.
ulalume said:
so is this actually a problem or is it normal for everyone?. Mine looses 5-8% in the first couple of minutes after I unplug the charger..
Click to expand...
Click to collapse
Its normal. I usually lose the first 5% of a full charge in a couple of minutes. After it gets to 95%, battery charge will drain normally depending on usage.

Vino Kulafu said:
Same experience. Around 5% to 10% is lost during my reboots.
Its normal. I usually lose the first 5% of a full charge in a couple of minutes. After it gets to 95%, battery charge will drain normally depending on usage.
Click to expand...
Click to collapse
ok then, thanks...I just thought that this didn;t happen when I was on GB, but it doesn;t matter anyway..

If I reboot once, I will lose between 5 - 10% battery. However, if I reboot straight after the first reboot, I will lose between 0 - 2% battery. I've never really understood this.
Sent from my GT-I8160 using XDA Premium 4 mobile app

Phone need more energy for reboot, that causing the drain. Mine usually drop 2-5%. After recharge battery alsi drop to 95-92% fast. Thats normal
Sent from my GT-I8160 using xda app-developers app

Battery Charging Issue
Is this normal?
When I charge my battery whether it be from mains or USB computer it charges ok, but as soon as it gets to 100% it still says charging for a little time and doesn't report the unplug charger message right away.
With the Jellybean 4.1.2 system I don't get the alert tone when the battery reaches FULL, therefore I have a feeling that when it still says charging even though it's showing 100% that it's actually decreasing power at that point, any help please?
I have tried other batteries, and one in particular goes from 90% right up to 100% and seems to miss that last 10 percent, so I don't use that one now.
I have the most current firmware installed.

Buy a new one
Sent from my GT-I8160

pbgrout said:
Is this normal?
When I charge my battery whether it be from mains or USB computer it charges ok, but as soon as it gets to 100% it still says charging for a little time and doesn't report the unplug charger message right away.
With the Jellybean 4.1.2 system I don't get the alert tone when the battery reaches FULL, therefore I have a feeling that when it still says charging even though it's showing 100% that it's actually decreasing power at that point, any help please?
I have tried other batteries, and one in particular goes from 90% right up to 100% and seems to miss that last 10 percent, so I don't use that one now.
I have the most current firmware installed.
Click to expand...
Click to collapse
when it says 100%, you still have to wait for a few minutes before it displays the green "full" icon in the upper left corner and asks you to disconnect the charger.
However, the first 5-8% always drains REALLY fast and not proportionally to the rest of the battery drain...

I think It may have been my battery giving me the huge drops. I don't seem to have this issue any more after buying a new one.

ItsHumf said:
I think It may have been my battery giving me the huge drops. I don't seem to have this issue any more after buying a new one.
Click to expand...
Click to collapse
what about the initial drain? does the first 10% still drop fast or has this changed too with the new battery?

I just wish that JellyBean 4.1.2 would give an alert sound when the battery has reached it's full limit like Gingerbread used to do.
Who would be the best place to ask them to do this on their next update?

But I think that it does..a very short one indeed, but it does, along with the screen lighting up briefly..

ulalume said:
But I think that it does..a very short one indeed, but it does, along with the screen lighting up briefly..
Click to expand...
Click to collapse
Doesn't make a sound on my phone and im not always looking at my phone to see it light up.
I have sounds all turned on and on full volume so no reason why I dont hear a sound when its reached full capacity.

ItsHumf said:
I've been experiencing huge battery drops (from 10% up to 20%) after I reboot my phone. Is this a KitKat issue or is it my battery?
In the morning from 99% (after checking a few messages in the morning), I rebooted and I dropped 11% to 88%.
I think It may have been my battery giving me the huge drops. I don't seem to have this issue any more after buying a new one. :good:
Click to expand...
Click to collapse
are you using custom battery ? like double-powered-battery

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.

[Q] Sudden battery drop HTC One M8

Last weeks my phone time after time suddenly shuts off due to no battery left.
without even giving the usual warning popups.
Check the photo to see what happens.
Already did battery test, no unusual results.
also the factory reset didnt help.
How to solve this?

JWD1993 said:
Last weeks my phone time after time suddenly shuts off due to no battery left.
without even giving the usual warning popups.
Check the photo to see what happens.
Already did battery test, no unusual results.
also the factory reset didnt help.
How to solve this?
Click to expand...
Click to collapse
It could be due to calibration issue. Try using your phone's battery all the way to 0% and it'll shut down automatically and turn it off to charge all the way to full and use it. If the problem still persists, there could be some issues with the battery but if the issues doesn't exist anymore, it could be calibration issue.

more info
Check the photo's

I've seen this happen (either to me, or reports by others) on just about every recent Android device I've owned (4 different devices), not just HTC, but Samsung as well. The battery seems to tank instantaneously, losing 30 or 40% of its charge or more, and the device shuts down. Doesn't usually happen often, just rarely. And some folks will probably never see it happen.
As mentioned above, I can only assume its a metering glitch. Just recharge the device (recalibrate the meter, if you like), and move on.

JWD1993 said:
Check the photo's
Click to expand...
Click to collapse
redpoint73 said:
I've seen this happen (either to me, or reports by others) on just about every recent Android device I've owned (4 different devices), not just HTC, but Samsung as well. The battery seems to tank instantaneously, losing 30 or 40% of its charge or more, and the device shuts down. Doesn't usually happen often, just rarely. And some folks will probably never see it happen.
As mentioned above, I can only assume its a metering glitch. Just recharge the device (recalibrate the meter, if you like), and move on.
Click to expand...
Click to collapse
found this somewhere a while ago ..it's worth a shot
Have you tried a hardware battery recalibration?
The battery calibration starts with the phone completely off. The steps are as follows: Charge the device for at least 10 minutes using the original charging cable in a wall outlet. With the device powered off while still plugged into the wall outlet, press and hold the volume up, volume down and power button for two full minutes. Use three fingers to hold these buttons and do not let go at any time. They will be held in at the same time for this to work. After two minutes, you can let go. At this point, the device should boot up and battery/charging logic will be re-calibrated.
Click to expand...
Click to collapse
I have also charged the phone to 100% reboot to TWRP charge to 100% then shut down and charge to 100%
all three locations monitor the battery differently. In fact TWRP sometimes showed 93% when the OS said it was full.

I've never heard of button combos affecting the battery calibration, and it sounds like a placebo to me. I also think the trick of charging the phone while off was disproved as baloney, a long time ago.
All the meter needs to do is set "high" and "low" flags to corresponding voltages. I seriously doubt any button pushing will affect this. Let the phone charge to 100%, let it stay on the charge for a while to ensure any saturation charge. Then drain to close to empty. I don't personally advise to drain to shutdown. I understand its not zero voltage or anywhere close (more like 3V). But its also not good for the battery.

redpoint73 said:
I've never heard of button combos affecting the battery calibration, and it sounds like a placebo to me. I also think the trick of charging the phone while off was disproved as baloney, a long time ago.
All the meter needs to do is set "high" and "low" flags to corresponding voltages. I seriously doubt any button pushing will affect this. Let the phone charge to 100%, let it stay on the charge for a while to ensure any saturation charge. Then drain to close to empty. I don't personally advise to drain to shutdown. I understand its not zero voltage or anywhere close (more like 3V). But its also not good for the battery.
Click to expand...
Click to collapse
Well the information come from the Android Forums ...it has worked for others
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:
Click to expand...
Click to collapse

clsA said:
Well the information come from the Android Forums ...it has worked for others
Click to expand...
Click to collapse
Citing the source and providing details makes it sound a little less hokey. Still, probably impossible to say whether it really "works", or just a placebo.
Not sure what "coordinates and normalizes charging" if anything. But battery stats was debunked some time ago as something even worth wiping (since its wiped every time you charge): http://www.xda-developers.com/android/google-engineer-debunks-myth-wiping-battery-stats-does-not-improve-battery-life/

redpoint73 said:
Citing the source and providing details makes it sound a little less hokey. Still, probably impossible to say whether it really "works", or just a placebo.
Not sure what "coordinates and normalizes charging" if anything. But battery stats was debunked some time ago as something even worth wiping (since its wiped every time you charge): http://www.xda-developers.com/android/google-engineer-debunks-myth-wiping-battery-stats-does-not-improve-battery-life/
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yeah maybe the OP @JWD1993 can test it and let us know

clsA said:
yeah maybe the OP @JWD1993 can test it and let us know
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Agreed. And thanks for the additional info, in any case.

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redpoint73 said:
Agreed. And thanks for the additional info, in any case.
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Tested it a few times last days.
when the battery dropped from around 40% to 0% (and device went off).
i charged it for about 10 minutes.
then dit the trick with the three buttons.
i was surprised to see that after rebooting the battery level was 35%.
Before i did the trick the phone showed 5%
But sad enough the device went off after 15 minutes..
and the percentage was 0 again.
This doesn't happen rarely.. it happens every day

JWD1993 said:
Tested it a few times last days.
when the battery dropped from around 40% to 0% (and device went off).
i charged it for about 10 minutes.
then dit the trick with the three buttons.
i was surprised to see that after rebooting the battery level was 35%.
Before i did the trick the phone showed 5%
But sad enough the device went off after 15 minutes..
and the percentage was 0 again.
This doesn't happen rarely.. it happens every day
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that's pretty crazy and at 10:10 at night ... do you work late or what happens at 10:10 PM

clsA said:
that's pretty crazy and at 10:10 at night ... do you work late or what happens at 10:10 PM
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Nope, most of the time im just checking social media.. or chatting at whatsapp

JWD1993 said:
Different timezone I think. It's 23.54 over here..
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I was referring to the time the battery dropped in the last graphic

clsA said:
I was referring to the time the battery dropped in the last graphic
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Yeah sorry, misunderstood.
Edited my post
And as you could see i barely used my device today..
so it should last a way longer than this after a half year of use