Hey there pianoman, well battery life on max power is about 7 - 9 minutes. Not much really. if you put it to level 3 - 5 it lasts about 30 - 40 minutes. in level 1 it lasts almost an hour. It takes about 2 hours to fully charge. and i guess it depends on how many times you fire it on and off, and the effects like flicker and pulse, or the clash flash. good thing it is rechargeable, if it wasn't i would've spend hundreds on batteries by now :D