Things You'll Need
Instructions
Carefully open the battery by cutting along the outside of the case where the two halves meet with your knife.
Remove the top of the battery casing to expose the memory card.
Locate the connecter labled ICO4 or CO4 depending on your battery.
Remove the fifth pin leg of the ICO4/CO4 chip.
Tape the battery back together and insert it back into the PSP.