How to install iphone 4s battery

Remove the two 3.6 mm Pentolobe screws next to the top connector. During reassembly I recommend you replace the 5-point screws with the equivalent Phillip screws.

Push the rear panel toward the top edge of the iPhone. The panel will move about 2 mm.

Pull the rear panel away from the back of the iPhone, being careful not to damage to plastic clips attached to the rear panel. Remove the rear panel from the iPhone

Remove the following screws securing the battery connector to the logic board: One 1.7 mm Phillips screw as shown in RED & One 1.5 mm Phillips screw as shown in Orange

Use a pair of tweezers to remove the pressure contact near the battery connector. When reinstalling the pressure contact, be sure to clean it. The oils on your fingers can create wireless interference

Use the edge of a plastic opening tool to gently pry the battery connector up from its socket on the logic board.

Insert the edge of a plastic opening tool between the battery and the outer case near the bottom left corner of the iPhone. Run the plastic opening tool along the edge of the battery and pry up.

Use the exposed clear plastic pull tab to peel the battery off the adhesive securing it to the iPhone. Remove the battery.