Removal Procedure

Insert a flat object, with a thin edge, into the notch located below the rear compartment release button and separate the bottom half from the top half of the transmitter.

Fig 1: View Of Transmitter Battery Components
Courtesy of GENERAL MOTORS CORP.

NOTE: When replacing the battery, use care not to touch any of the circuitry. Static from your body transferred to these surfaces may damage the transmitter.
Remove the battery from the transmitter.
IMPORTANT: Do Not use metal objects to remove battery