After installing 705 roms, started to have crazy battery problem even after wiping battery stats. It will stay at 100 for a long time then slowly go down to around sixty something...Then...suddenly drop to 5%. Anyone else having this problem or have a solution? I have already done battery calibrations and erased battery stats a few times, but the problem persists.
Offical link here http://bbs.ainol.com/forum.php?mod=viewthread&tid=19089&extra=page%3D1
Step 1. your tablet must be rooted.
Step 2. get any Terminal command line apps from google play
Step 3. in the Terminal apps type "su"(without quote) and [Enter] change user to root, then type the following command :
echo B8 > /sys/devices/i2c-2/2-0034/axp20_reg
echo B820 > /sys/devices/i2c-2/2-0034/axp20_reg
Step 4. at this time you can reboot your tablet and the battery will run down to 5%, then you can try to full charge your tablet to see the problem is fixed or not.
ONLY do the following Step 5 to 6 if you still got battery stuck after Step 1 to 4
Step 5. if the problem still exist, then open the Terminal apps again and type the following command :
echo 08 > /sys/devices/i2c-2/2-0034/axp20_reg
echo 0800 > /sys/devices/i2c-2/2-0034/axp20_reg
Step 6. reboot to take effect.
1. let your battery nearly completely discharge (for example watch some movie or play games to run out the battery), it may help to more accurate the battery percentage
2. this method are reset PMU and the softare accurate parameter, the battery will go down to 5% after reboot , no need to worry, charge up the battery to 100% is ok.
3. Aurora 2 and Elf 2 can use this method to fix the battery problem, it seem Fire and Mars can use this method too, but the path maybe different.
4. Some users in Ainol foumr say that this method works, but I haven't try it yet, because I used the flash rom method to fixed my 100% battery problem.