Polar Electro RC3 GPS Getting Started Manual page 23

To change the battery:
1. Lever the battery cover open by using the
bracket on the strap.
2. Remove the old battery from the battery cover
with a suitable sized small ridgid stick or bar,
such as a toothpick. A non-metal tool is
preferable. Be careful not to damage the battery
cover.
3. Insert a new battery (CR 2025) inside the cover
with the negative (-) side outwards.
4. Align the ledge on the battery cover with the
slot on the connector and press the battery
cover back into its place. You should hear a
snap.
Keep the batteries away from children. If
swallowed, contact a doctor immediately. Batteries
should be properly disposed of according to local
regulations.
Danger of explosion if the battery is replaced with
wrong type.
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