A pandora battery is just a normal battery with the serial number (stored on chip) changed to 0xffffffff,

There are few ways to make a pandora battery,

1, One way is to use a PSP already on custom firmware to change the serial number of the battery using an app for the PSP but this only works on a PSP already running custom firmware,

2, Another way is to open up your battery and lift one of the legs/pins on one of the chips this make it seem like the serial is 0xffffffff and does the same job (google for an image of the pin to lift),

3, Buy a ready made pandora battery (This way sucks because pandora is meant to be free),


Then a memory stick needs to be setup with the correct files,

When this memory stick setup is used with the pandora battery a PSP running official firmware can be made to have custom firmware installed,