Polar Electro RS300X User Manual page 39

1. Open the battery cover of the connector with a coin by turning it from
CLOSE to OPEN.
2. Replace the old battery inside the cover with a new one. Make sure the
positive (+) side is facing the cover.
3. Replace the old sealing ring with a new one, fitting it snugly in the cover
groove to ensure water resistance.
4. Put the cover back on and turn clockwise from OPEN to CLOSE.
Customer Service Information 39
ENGLISH