Use this guide to replace the 3.7 lithium-ion battery inside the DualShock 4.
Step 1 Controller
Using the Phillips #00 Screwdriver, remove the four 6.0 mm screws securing the rear cover to the controller.
Do not forcefully loosen the screws, as it will amount to permanent damage of the threads, making removal impossible.
Beginning with the left shoulder:
Pinch the left shoulder of the controller to introduce an opening.
Wedge a plastic opening tool into the opening and slide it up towards the joystick.
Pull down on the plier to crack open the casing.
Repeat these steps for the right shoulder.
Wedge a plastic opening tool into the case-splittings and pull down to crack open the casing near the following buttons:
Split the plastic covers of the controller apart, taking note that they will still be attached by circuit board ribbons.
Three small pieces are often released from the framework. To prevent loss, maintain a controlled work field.
2 Trigger Springs
1 Grey Reset Button Extension
Step 4 Battery
Detach the motherboard ribbon connecting the two sides of the controller by using your fingers.
After the two halves are separated, place the top of the controller off to the side.
Using the blunt forceps, remove the battery plug by gently rocking the forceps side-by-side to loosen the plug.
After removal of the plug from the motherboard, the battery can be lifted off of the controller.
Hasty removal of the battery plug could warp the plastic grips of the plug.