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How to manually trigger battery history reset

8th July 2014, 05:27 AM |#1  
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Android by default resets the battery history once battery is charged beyond 90% or when certain other conditions are met.

What I did which did not work:
Delete /data/system/batterystats.bin while android is running.
Battery history is still there

What I did that work:
Delete /data/system/batterystats.bin in adb while in recovery.
Battery history got reset.

But I am looking for an easier way to do this - the android system can reset the battery history on the fly without the need of going to recovery/reboot.

Before you say deleting this file won't help with the battery life - yes, I am very award of this myth. But all that I am looking to do is really just to reset battery history on the fly, because I often amass weeks of battery history that it becomes difficult for me to look at how the battery is doing in the past few days or so.

Charging battery above 90% would of course work, but this is not what I am looking for. I want a way to manually and instantly reset the battery history.

Thank you! I appreciate your input and help.
8th July 2014, 07:07 AM |#2  
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Quote:
Originally Posted by kyva1929

Android by default resets the battery history once battery is charged beyond 90% or when certain other conditions are met.

What I did which did not work:
Delete /data/system/batterystats.bin while android is running.
Battery history is still there

What I did that work:
Delete /data/system/batterystats.bin in adb while in recovery.
Battery history got reset.

But I am looking for an easier way to do this - the android system can reset the battery history on the fly without the need of going to recovery/reboot.

Before you say deleting this file won't help with the battery life - yes, I am very award of this myth. But all that I am looking to do is really just to reset battery history on the fly, because I often amass weeks of battery history that it becomes difficult for me to look at how the battery is doing in the past few days or so.

Charging battery above 90% would of course work, but this is not what I am looking for. I want a way to manually and instantly reset the battery history.

Thank you! I appreciate your input and help.

You tried deleting batterystats.bin which did not immediately take effect. You need to restart phone after deleting it when Android is running.

Immediate reset stats is only available in Android Kitkat 4.4.x.
Open battery history from settings and press that dustbin icon.

3 working solutions for pre-kikat

1) Delete batterystats.bin when android is running and reboot. (You can also do fast reboot from ROM Toolbox or Rebooter app.
Do not confuse with fastboot
Or type this in terminal
Code:
$ su
# busybox killall system-server
This reboots fast than normal reboot.

2) Delete batterystats.bin from recovery and reboot.

3) Make a script that will delete batterystats.bin and (fast) reboot phone and create its shortcut on home screen.

Press Thanks if helped.

Sent from my GT-I9001 Gadget of Mass Destruction with CM11 using XDA Developers App.
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8th July 2014, 07:24 AM |#3  
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Quote:
Originally Posted by hnkotnis

You tried deleting batterystats.bin which did not immediately take effect. You need to restart phone after deleting it when Android is running.

Immediate reset stats is only available in Android Kitkat 4.4.x.
Open battery history from settings and press that dustbin icon.

3 working solutions for pre-kikat

1) Delete batterystats.bin when android is running and reboot. (You can also do fast reboot from ROM Toolbox or Rebooter app.
Do not confuse with fastboot
Or type this in terminal

Code:
$ su
# busybox killall system-server
This reboots fast than normal reboot.

2) Delete batterystats.bin from recovery and reboot.

3) Make a script that will delete batterystats.bin and (fast) reboot phone and create its shortcut on home screen.

Press Thanks if helped.

Sent from my GT-I9001 Gadget of Mass Destruction with CM11 using XDA Developers App.

Thank you, that works.

I was looking at the logcat and see that

WriteUnpluggedReferenceService was called to reset the battery stats. Is there any way that we can manually call this service? I think people debugging the android system should probably have access to repeating these steps in order to replicate a problem?
1st February 2015, 09:04 AM |#4  
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delete batterystats.bin works no more in Lollipop.
For testing Batterie life any time i need a clear history without charge to 100%.
Is there a way to reset the history on the fly in lollipop without charge to 100%?

In the Web i have found this: /com/android/internal/os/BatteryStatsImpl.java

Quote:

// We will reset our status if we are unplugging after the
// battery was last full, or the level is at 100, or
// we have gone through a significant charge (from a very low
// level to a now very high level).
if (oldStatus == BatteryManager.BATTERY_STATUS_FULL
|| level >= 90
|| (mDischargeCurrentLevel < 20 && level >= 80)) {
doWrite = true;
resetAllStatsLocked();
mDischargeStartLevel = level;

with this info is there a developer that can write a little program which do the same as charge to 100% at any time?
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