lol, i see this is becoming a popular trend (yes, i am a trend-setter!)
i am assuming you're getting a slim so straight off you're fucked unless you get a Pandora battery. you can sometimes find these at RadioShack, greedy ass Datel is profiting off this, but it's the best commercial option you got. it's usually called the Datel Battery Tool, or something similar. you can also go on ebay, people are also profiting by having pre-made pandora packs.
otherwise, find someone who has a hacked PSP (fat, preferably), and make a Pandora. lots of tutorials online on how to do this.
third option, feel free to send it to me and i'll do it free of charge, evilbore discount