Remove the battery.

If your replacement battery came in a plastic sleeve, remove it before installation by pulling it away from the the ribbon cable.

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.

During reassembly, make sure the battery is seated firmly against the rear case. This will prevent any damage to other components when reinstalling the front panel assembly.

Perform a hard reset after reassembly. This can prevent several issues and simplify troubleshooting.