Suunto Wrist-Top Computer Watch Replacement Battery Kit (X6HR, Observer, G6 Pro, M3, X6, S6, G3, and t6) Part# SS0S4721000 Battery Kit with Plastic Cover Battery kit includes a CR 2032 battery, a battery lid with O-ring For Suunto X6HR, Observer, G6 Pro, M3, X6, S6, G3, and t6