Long power backup around 24 hours with Normal Usage, Provides good talk around 12 hours and standby time around 36 hours approx depend upon Background app, Overall Good performance.
if you are unable to turn your phone on after installed, please reinstall the ribbon cable, check its connector and clip it hard. Next, charge your phone for 20 minutes or longer. Then try to turn on your phone.
CAUTION: Do not open, crush, puncture. short external contacts or dispose in fire or water. Risk of fire, explosion and burn. Do not open, crush,heat.