Amy Winehouse

psp pandora battery worth it?

i have a psp slim, and a friend told me with a pandora battery and magic stick i could run a rom on my psp… im not into pirating games or anything, because i dont like that… but i was wondering a) if this was true, how it works, etc, and b) if i do buy the battery (specifically this one: http://www.pandorabatterybuys.com/pandora-battery–memory-stick-duo-4gb-comb4.html) will it in any way harm my psp?

thanks