that might be a battery problem, because it shouldnt lose so much charge if its completely off.. maybe buy a new battery?

sometimes when i put my psp into sleep mode(flick the on switch once), it just restarts the next time i turn it on. this happens when i put it in sleep about 2 or 3 times. its pretty annoying cause sometimes i lose data and i have to do everything over again. my psp has cfw and help would be appreciated. thanks