Sony PS4 CUH-1106A A20 Safety Manual page 14

2
Using a crosshead screwdriver, remove the screws (4
places).
3
With the front of the controller pointing up, press in
the direction of the arrows to open the cover.
14
4
With the rear of the controller pointing up, remove the
cover.
5
After disconnecting the connector, remove the
battery.
Connector
Battery