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
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Hiya,
I was poking around the forums a couple days ago and I stumbled across a hack that recalibrates the phone's battery STATUS, it doesn't do anything about helping battery life or anything.
Last night when I was about to go to sleep I had a battery life of 32%. I plugged in the phone, and immediately restarted it. When it booted up again, I kid you not, it had 63% battery life. I turned off the phone while plugged in to see the battery icon, the one that shows.the battery status while its charging with the phone off, and indeed it showed around 63,65%.
Anyone know where I could find this? I think its buried somewhere on the forums.
Sent from my SAMSUNG-SGH-I897 using XDA App
locsplitter said:
Hiya,
I was poking around the forums a couple days ago and I stumbled across a hack that recalibrates the phone's battery STATUS, it doesn't do anything about helping battery life or anything.
Last night when I was about to go to sleep I had a battery life of 32%. I plugged in the phone, and immediately restarted it. When it booted up again, I kid you not, it had 63% battery life. I turned off the phone while plugged in to see the battery icon, the one that shows.the battery status while its charging with the phone off, and indeed it showed around 63,65%.
Anyone know where I could find this? I think its buried somewhere on the forums.
Click to expand...
Click to collapse
THIS WILL HELP RECALIBRATE YOUR BATTERY SO YOU DON'T HAVE THAT ISSUE
1.Charge till full when powered on
2.power off
3.charge till full again
3.boot into recovery(adb reboot recovery or Power off the phone and then hold the volume up + Volume down + the power key. When it goes black the 2nd time release the power button and keep holding the volume buttons.)
3.wipe stats by going into Clockworkmod recovery -> advanced -> wipe battery stats.
4.boot and continue to use as normal
Heres 1 from another board:
""So, you are having trouble with your battery seemingly draining too quickly, especially after having flashed many ROMs/Kernels/etc...
It is possible that the problem (or part of the problem) is not necessarily the phone using too much power. If this is the case for you, you should see some results from doing the following:
1. Connect the phone to the charger with the phone powered on, and allow the phone to charge until it shows 100%
2. Disconnect the phone from the charger, and power it off.
3. Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the battery indicator shows 100% (you can use vol-up/vol-down to make the indicator come back up when the screen goes to sleep).
4. Disconnect the phone from the charger and power it on.
5. Once the phone is powered completely on, power it off again and reconnect it to the charger until the battery indicator shows 100%.
6. Disconnect the phone, power it on, and use it.
You should only need to use this sequence one time.
Hope this helps.-Joeybear23"""
Hey all,
Noob question. I recently went to JVP (doc kitchen) and tried out multiple kernels (speedmod, fugu, tegrak). I only noticed this issue after going to tegrak's kernel so suspect it's kernel related.
The issue I'm having/suspect is that after "100% charge" the battery would start to be consumed (even if it is plugged in). This is most noticeable if I'm at my desk at work all day (phone on charge) or when I leave my phone charging overnight. When I disconnect to go home/go to work, I can see the battery is at 85% or similar (as if the phone wasn't on charge). If I was to disconnect it as soon as it hit "100%" it'll be at 96/97/98% as expected.
I'm not an expert and logcat confuses the heck out of me to be honest, but would anyone know what strings I can search for to determine if the phone "stops charging" when it hits 100%? I'd prefer it to be on a trickle charge (ie keep the battery at 96/97/98%) so that when I disconnect, I have a near full battery.
Is this a kernel issue? or a battery level calibration issue?
TIA
cheddarchi said:
Hey all,
Noob question. I recently went to JVP (doc kitchen) and tried out multiple kernels (speedmod, fugu, tegrak). I only noticed this issue after going to tegrak's kernel so suspect it's kernel related.
The issue I'm having/suspect is that after "100% charge" the battery would start to be consumed (even if it is plugged in). This is most noticeable if I'm at my desk at work all day (phone on charge) or when I leave my phone charging overnight. When I disconnect to go home/go to work, I can see the battery is at 85% or similar (as if the phone wasn't on charge). If I was to disconnect it as soon as it hit "100%" it'll be at 96/97/98% as expected.
I'm not an expert and logcat confuses the heck out of me to be honest, but would anyone know what strings I can search for to determine if the phone "stops charging" when it hits 100%? I'd prefer it to be on a trickle charge (ie keep the battery at 96/97/98%) so that when I disconnect, I have a near full battery.
Is this a kernel issue? or a battery level calibration issue?
TIA
Click to expand...
Click to collapse
Please do this procedure and see... once u finish ur 2 or 3 cycle u'll get the result...
- Charge your battery full, bump charge to get the highest level possible ; note that it's not a big deal if it shows 97% when you unplug after bump-charging
- Drain your battery to 0% until it shuts down by itself (without plugging the charger or connecting the phone to a pc)
- Wait 2 minutes and reboot the phone to ensure the battery is completely flat (it might reboot fully, half way, not at all, don't worry) until it dies again
- Remove the battery and wait 2 minutes
- Replace the battery and plug the charger without switching the phone on until it shows 100%
- When phone shows 100%, boot in recovery (volume up + home + power) and go to > Advanced > Wipe Battery Stats > Confirm (move up/down using the volume keys)
- Reboot the phone and unplug the charger when the "battery full notification" comes (wait for the notification before you unplug the charger)
- Now use your phone until the battery is flat again and charge full (no need to have it turned off, unless you it to charge faster). Repeat 2 or 3 times and your battery will be calibrated
- Only wipe battery stats once, run a few cycles of full charge / discharge and after that just use your phone as normal (i.e. no need to deplete / charge fully anymore).
A strange thing happened to me: last night I turned off the phone with about 60% of charge remaining, this morning I turn it on and I find 13%, after a reboot it gave me 50% ...
What can be the cause?
I found that here:http://forum.xda-developers.com/showthread.php?t=755903&page=33
You can try it :
This is the procedure that works for me:
The following steps should significantly extend the battery life on your phone:
1. Let the battery drain close to empty (5% or less).
2. Connect the phone to the charger (AC or USB, USB is better) while powered on and allow the phone to charge until the notification LED is green, indicating the device is fully charged and untill the voltage is at least 4187mV. A higher voltage like 4192mV or more is even better. Use a tool like Overcharged or Battery Indicator to monitor this. Note that a green notification LED does not automatically mean that the voltage is good too.
A higher voltage means in practice that it will take longer to discharge, a lower voltage means that the battery will discharge a lot quicker! The difference can be quite significant!
3. Disconnect the phone from the charger and power it off.
4. Reconnect the phone to the charger while powered off and allow the phone to charge until the notification LED is green. The notification LED may turn green immediately. Leave it on the charger for another hour.
5. Disconnect the phone from the charger and power it on.
6. Once the phone is powered on completely (has restarted fully) wait 2 minutes and power it off again.
7. Reconnect the phone to the charger while powered off and allow the phone to charge until the notification LED is green. The notification LED may turn green immediately. Leave it on the charger for another hour.
8. Leave the phone on the charger and reboot into the ClockWorkMod recovery menu and wipe the battery stats via -> Advanced -> Wipe battery stats.
9. Disconnect the phone from the charger, restart the phone and start using it as normal.
From then on always let the battery drain close to empty (5% or less) as often as possible and then charge untill the voltage is at least 4187mV. A higher voltage like 4192mV or more is even better.
Normally you will have to do this only once. However, on all Android ROMs, if you flash a ROM while charging or during the first boot screen on, first boot mucks up the levels Android thinks the phone is at, i.e. Android will think you’re at 100% when maybe you’re only 90% or whatever. So in theory you will need to repeat this every time you flash a ROM while charging!
Better is to make sure the battery is charged before you flash a ROM and just remove the USB/charge cable before you flash a ROM. Put it back in (if you must) after the first boot screen (when the custom screen or whatever shows).
Thank you, I'll try it
Looking for any help...
Battery will charge to 99%; however, the green light will never come (solid red) nor does it overheat.
Seems to have happened when i had the phone plugged into a the htc charging cord using a USB car charger.. device got really hot but was still one.
If I power the phone and hold the Power + Vol + & Vol - through 2 cycles the phone will power on with ~90% charge - if the phone is stuck at 99% a simple reboot will not correct the percentage. In addition, phone dies pretty quickly..
Device is rooted - happens with all roms
any help other than possible faulty battery would be appreciated.
Hello everyone, I've had my X4 for one and a half years now and the battery life has been nothing short of fantastic during the period.
But two days back, the battery started acting up pretty weird. I had it on charge and was using it while charging and in some time I noticed the battery percentage remained static for an unusual amount of time. So I unplugged it, and battery immediately dropped by 3 percent and drained down a few percent so fast like it had never before and then stayed at a percent (say 16%) for a long time and then drained normally afterwards.
When I plugged it in again, it charged for a little before getting stuck again (the number at which it gets stuck is random). And I've tried reboots, I've tried killing the phone and charging while it's off (same result).
I was wondering if this could be a problem with the cable or with the battery itself. But then again, the battery has remained stellar until two days ago and I'm confused if it could show its degradation in such a way. I haven't replaced the cable yet, maybe I'll have little luck with that.
Any help or suggestion would be appreciated. Thanks.
That reminded me of something i saw on the motorola support site where I logged in and registered my x4 - top on the help:
"Battery calibration
Back to Previous Page
Battery calibration
If you are experiencing incorrect or inconsistent battery level, quick battery discharge, slow or erratic charging speeds, or sudden power off or rebooting, a battery calibration could correct the problem.
To perform a battery calibration:
Force reboot the device by holding the power button until the device reboots
(For the moto z3 hold volume down + power to force the reboot.)
Plug into supplied charger
Charge to 100% and leave on the charger for at least an additional hour after getting to 100%"
Don't know if that has anything to do with the price of eggs but hopefully it will give you ideas...