Unscrew the four Phillips screws on the back of the PSP Go.

Rotate the PSP so you can see the top of the device.

Unscrew the two Phillips screws next to the volume buttons.

Use an PSP Go opening tool around the perimeter of the back cover to loosen it on all sides.

Open the back cover by gently lifting the right side, and rotating it to the left side (as if you were opening a book).

Be careful not to rotate the back cover from the bottom, as you will break the plastic screw holes on top of the device.

Pull the top cover upwards gently from its housing.

Use a PSP opening tool to gently flip up the left trigger connector.

Unscrew the lone Phillips screw holding the trigger in place. Remove both trigger and retaining plate from the PSP Go.

Do not peel the sticker away from the left EMI shield. It will expose the "VOID VOID" lettering that will void your warranty!

Use the PSP opening tool to gently peel away at the "Warranty Void" sticker. Start on one edge, as shown, and slide the tool from side to side until the sticker is removed from just the battery.

Gently pull the sticker away from the battery connector, just enough so that the connector is visible.

Wedge a PSP opening tool in between the connector and logic board, and gently pull the connector upwards.

Make sure not to disconnect the white connector socket on the logic board, and just the connector itself.

Use a PSP opening tool to pop out the battery, being careful not to snag the "Warranty Void" sticker in the process.

When putting a new battery into the PSP Go, make sure you hold the "Warranty Sticker" so you don't put the battery on top of it.