Reportedly, android users have been frequently complaining about the quickly battery draining issues they found after flashing custom ROMs (for instance Cyanogenmod 7) to their android devices. If you are one of them and want to solve this issue, then you are at the right place! Just follow the guidelines posted there in order to fix quick battery drainage issue after flashing custom ROMs’ in Android gadgets.
First let me explain you that why this issue happens. Actually the battery gauge in the status/notification bar is a expression of the battery stats.bin file in the data/system/ directory. Whenever a custom ROM is flashed on it, users should recalibrate the software or else you could experience a hastened battery exhaust.
The hastened exhaust is occurred by the “off-mark” battery stats file that tricks the battery into believing that it has attained the conclusion or climax of its capacity earlier than it is in fact fully exhausted or charged. Carry out the below treatments to fix this issue:
Step#1 (Charge your device completely): If following a preceding effort to regulate the battery, your device falls short to charge then it is likely that it has been adjusted improperly. If so is the case with you, switch your device off and plug it in for charging until the LED marker turns green. If your device does not equip an LED marker, you’ll have to verify the battery level by toggling it on.
Step#2 (Reboot into recovery mode): If your device is switched off, push down the Volume and Power buttons simultaneously so as to enter the bootloader and choose Recovery to enter into system recovery.
Step#3 (obliterate battery Stats): Choose advanced > Wipe Battery Stats > Yes – Wipe Battery Stats, as shown in the screenshots below. (In ClockworkMod Recovery v184.108.40.206).
As a final step, go back to the main system recovery menu and reboot (reboot system now). The issue should have been fixed by now!