SUUNTO t4 - Manual (Page 49)

6. Perform the final tightening with a suitably sized coin.
NOTE The markings on the cover may be left unaligned once the cover has been
tightened. If the old cover is undamaged, it does not need to be replaced.
NOTE If the threads of the battery compartment cover are damaged, please send
your device to an authorized Suunto representative for service.
NOTE Replace the battery with extreme care to ensure that your Suunto t4 remains
water resistant. Careless battery replacement may void the warranty.
NOTE Heavy use of the backlight will significantly reduce battery life.
7.3.2. Replacing the battery of the heart rate belt
The average expected battery life of the transmitter belt is 300 hours of use in ideal operating
temperatures. If your Suunto t4 does not receive a signal when the transmitter belt is active, you
might need to replace the battery.
To replace the battery:
1. Use a coin to open the battery compartment cover on the backside of the transmitter belt.
Ensure that the O ring and all surfaces are clean and dry. Do not stretch the O ring.
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