SUUNTO LUMI - Manual (Page 40)

9 REPLACING BATTERY
Your Suunto Lumi operates on a 3-volt lithium cell, type: CR 2032.
NOTE: To reduce the risk of fire or burns, do not crush, puncture or dispose of
used batteries in fire or water. Only replace them with manufacturer-specified
batteries. Recycle or dispose of used batteries properly.
Use a coin to open the battery compartment on the back of your device. First
make sure that the O ring and all surfaces are clean and dry. Then remove the
old battery. Place the new battery into the battery compartment with the
positive side facing up. Slide the battery gently against the contact plate on
the side, ensuring that it does not break or bend out of place. When you are
replacing the cover, rotate it carefully counter-clockwise with your thumb in
order to align the threads. The cover should rotate easily at first without having
to use force. If you have to use force right at the start, the threads are misaligned
and they may be damaged. Finally tighten the cover with a suitably sized coin.
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