[Oxygen ROM] Battery percentage error

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Been using Oxygen since the past 2 days, the best ROM lately for me..
But this is one problem I encountered today.. there was 53% left and I'd been using the phone for quite some time like 1-1.5hrs and there was no drop in battery percentage (I know battery life on this ROM is good, but this was too good to be true)
I even checked in settings-about phone-status-battery level.. 53% there too.
I did a reboot, and percentage went down to 19%

Attached is the screenshot.
Notice the graph going horizontal and then vertical.

Turn off your wifi before you let your device go into sleep.

sounds like an unexpected solution, but will try doing that. thanks.
EDIT: I DID NOT turn wifi on. you can see from the screenshot, there was no screen on when wifi turned itself on. weird.

Originally Posted by yash3339

sounds like an unexpected solution, but will try doing that. thanks.
EDIT: I DID NOT turn wifi on. you can see from the screenshot, there was no screen on when wifi turned itself on. weird.

Yes there is, as you see wifi was on when you are not using the phone

I had this same problem with GingerLol ROM. Now that I'm using cm9, I cannot test if it solves the problem.

The above solution had worked for you, yash3339?

Thanks for the answer, nocterum!

@malfatti: It did work for me I guess, mainly because I know what's causing the problem, and it's pretty avoidable.
Thanks nocterum.

If you have the cwm recovery, there is an option to delete battery stats. First download a battery calibration app. After the battery is charged to 100% reboot into recovery and delete the battery stats. then reboot normally and run the battery calibration app. Unplug your phone and use it until it fully discharges and turns off. Then recharge it again and you should be good to go. I was having similar problems running the IHO CM7 build but that fixed my problems completely.

Originally Posted by freestylejunki32

If you have the cwm recovery, there is an option to delete battery stats. First download a battery calibration app. After the battery is charged to 100% reboot into recovery and delete the battery stats. then reboot normally and run the battery calibration app. Unplug your phone and use it until it fully discharges and turns off. Then recharge it again and you should be good to go. I was having similar problems running the IHO CM7 build but that fixed my problems completely.

I think that you were lucky when it fixed for you, just a coincidence... deleting battery stats in recovery does the same thing as deleting using battery calibration app... and also, if your phone is charged to 100% and you unplug it, battery stats are wiped automatically... and they have nothing to do with the percentage shown... battery stats are the info about what apps used how much battery, for how long, wakelocks, etc... it does not help battery in any way...

And this thing happens because the % shown is just an approximation of battery %...

About wifi thing, how can it get enabled by itself??? You said you were using the phone that time, but then you say you didn't use Wi-Fi??? I think you start to believe battery stats more than you believe your own brain...


I was born in the '90's... 1290's >

This happen to me couple of times in lupo's cm9 too

Sent from my LG-P500 using XDA