well i searched over the internet to find how to increase my battery life and i fonund a way that lot of people said that this way increased there battery life.
here is what you need to do:
charge your battery to 100%
go recovery mode: ADVANCED- WIPER BATTERY STATS
unplug the device from the charger
and select yes.
than dont charge the battery let the battery go to 0% and than charge it again to 100% and spend the battery life again without charge it.
do it 4-5 times and than your battery life should be a lot bigger.
im on second round.
if you do it please tell here.
and if you see that the battery life become a lot bigger tell this here too.