The TechZone tests the Cellboost for PSP. It's a device to extend the Sony
PSP battery life.

Say you're playing Hot Shots Golf for the Sony PSP, and you're about to beat the course record, when all of a sudden your battery light starts to flicker! You're on a bus or a flight that will last two more hours. What do you do!? You have no access to a wall outlet, your charger is at home, and you don't want to lose al l the hard work you just put in. Well you won't have to worry if you're packing a Cellboost for PSP with you.

Cellboost For PSP Review