the 1900mAh battery i had use to give me great battery life, i use to be able to get at least 20 hours of battery life. i.e. disconnecting at 9am and then at 9pm at night i'd still have something like 40-50% battery left.

this is not mugen proper but i think it's their supplier in China. battery is even worse with the stock battery...

i only get something like 12 hours (even less maybe) now...