Instructions
Remove the PSP Pandora battery from the device and place it to the side. Insert the PSP charger into the wall and connect it to your PSP.
Turn the PSP on and wait for it to boot into the PSP operating system, the XrossMediaBar (XMB).
Insert the Pandora battery back into the PSP with the PSP still on and connected to the charger.
Unplug the charger from the PSP and the PSP will remain on, using the power from the Pandora battery.