Once the back casing on the device has been removed, turn the device over and look for the two cables that need to be disconnected from the motherboard.

The first cable to be disconnected is a ribbon cable that runs across the entire battery. Using a spundger tool or tweezers, gently lift the black part of the connector upwards towards the battery. Once lifted up, use a pair of tweezers to pull the ribbon cable from its housing.

The second cable, which connects the battery to the motherboard, is removed in a similar fashion. First release the housing lock by flipping the back part of the connector upwards. Then remove the cable using a pair of tweezers.