3. Replace the battery compartment door.
The Chestbelt
1. Open the transmitter battery lid with a coin by turning
counterclockwise.
2. Insert one CR2032, 3V lithium battery with the words on the
battery facing you.
NOTE Take care not to touch the two contacts, otherwise the
battery can discharge.
3. Replace lid.
If you are unsure about the procedure consult your dealer.