my psp battery is dead and wont charge but i want to downgrade using dark alex 2.71-1.50 downgrater as shown in this guide http://forums.afterdawn.com/thread_view.cfm/389016. the gide dos not mention needing a charged battery at all so my question is should i go ahead and downgrade or will downgrading without a battery brick my psp. secondly once i have 1.5 on my psp i plan to put a custome FW on it . whitch one should i chose for playing psx games snes emulators and playing psp games off the memory card. also if anyone could tell me what the diferent letters after the FW numbers mean that would be most aprecheated.