How to Use

Battery Information

Battery Type

Garmin and Suunto chest belts take one 2032, which is a 3-volt lithium coin cell battery.

Battery Life

  • Garmin: About 1000 hours at one hour of use a day
  • Suunto: About 300 hours

Battery Replacement

Note: Suunto recommends changing the battery cover and O-ring whenever the battery is changed to ensure the transmitter remains clean and water resistant. Replacement covers and O-rings can be obtained from Suunto.

Garmin and Old Style Suunto Chest Belt

  1. On the back of the transmitter, open the battery door by rotating it counter-clockwise.
  2. Remove the existing battery by pressing lightly on one edge of the battery until it pops free of the compartment.
  3. Wait 30 seconds. Place the new battery into the battery compartment with the positive side facing up.
  4. Replace the battery compartment cover and turn it clockwise until it is locked.

Suunto Comfort Belt

  1. On the back of the transmitter, gently pry the battery door open using a screwdriver.
  2. Remove the existing battery by pressing lightly on one edge of the battery until it pops free of the compartment.
  3. Place the new battery into the battery compartment with the positive side facing up.
  4. Replace the battery compartment cover and press it down on all edges until it snaps closed.