Remove the battery.

Reinstall the Taptic Engine and speaker before installing a new battery. This helps keep the battery aligned correctly during installation.

Before you adhere the replacement battery, temporarily reconnect the battery connector to the motherboard socket. This ensures that the battery is properly aligned in its recess.

Adhere the battery, disconnect it, and continue reassembling your device.

If your new battery doesn’t have adhesive preinstalled, refer to this guide to replace the adhesive strips.

Perform a force restart after reassembly. This can prevent several issues and simplify troubleshooting.