The batteries typically last one year. We highly recommend that you
contact the retailer or our customer service department if you need to
replace them.
To replace the watch battery:
1. Undo the four screws and remove the back plate.
2. Using a thin blunt instrument, hook the release catch and lift the
clip.
3. Remove the old battery and slide the new battery into the battery
compartment with the +side upwards.
4. Replace the battery clip, back plate and screws.
To replace the chest belt battery:
1. Using a coin, twist the compartment lid counter-clockwise until it
clicks out of place.
2. Remove the old battery and insert the new battery with the +side
upwards.
3. Replace the battery compartment lid by twisting it clockwise until it
is firmly in place.
