The Pandora Battery allows users to recover PSPs from a bad flash, you might
have downgraded the PSP incorrectly, or failed an update, which left the PSP
completely dysfunctional, the key is not to worry because with a Pandora's
battery you can recover ANY PSP back to it's original state.
3.6v 1200 mAh Pandora Battery for original/PSP-100x model PSP
Allows you to put the PSP into service mode