Now this is a rare one in my collection. Datel Battery Service Tool for PSP. Datel, a very nice and handy device that can convert your genuine PSP battery into Pandora battery
Create Pandora Battery and Patch Firmware for Sony PSP : 4 Steps - Instructables
How to Create a Pandora battery with a fat PSP « PSP :: WonderHowTo
Create Pandora Battery and Patch Firmware for Sony PSP : 4 Steps - Instructables
PSP Pandora Battery & Jigkick 1GB, - China (mainland) in TV, Handheld Game Parts & Accessories/n.e.s. on ttnet.net
Super Pandora Battery for PSP2000 - China Game accessories and PSP accessories price