Quote: HOW-TO: Restore a battery used for unbricking - unbrick without buying a spare!
If you only have one battery and want to unbrick your PSP, you can.

1) Convert your battery into a jigkick one using "Pandora's Battery Creator",
but before you press X, press TRIANGLE
to backup your battery's EEPROM to ms0:/eeprom.bin

2) Unbrick your PSP as normal     (i like this line)

3) When you are done unbricking, take out the battery and the magic memory stick.
Start up the PSP using the AC adaptor (do not try to use a USB charger,
it will not start up)

4) Insert the magic memory stick and the magic battery

5) Run "Pandora's Battery Creator" again

6) Press L+R to restore the ms0:/eeprom.bin to your battery

NOTE: You can also restore a battery without having made a backup,
by pressing SQUARE at step 6.
This will generate a fake serial for your battery (0x12345678)
which allows it to work normally, but there could be side-effects.

Have fun, and thanks to everyone in the Prometheus/C+D team.