SUUNTO E203 - Manual (Page 12)

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3. Turn the coin counterclockwise gently to the open position marked on the back of
the case.
4. Remove the battery compartment cover.
5. Remove the old cell from the battery compartment and ensure the O-ring and all
surfaces are clean and dry. Be careful not to pinch the O-ring. Do not use a knife or
other sharp objects to open the battery housing. These will damage the o-ring. Do
not stretch the O-ring.
6. Place the new cell into the battery compartment (negative side down, positive side
up).
7. Ensure the O-ring is in place to keep the Escape203 Electronic Altimeter
waterproof and replace the battery compartment cover back onto the backside of
the instrument.
8. Insert a coin into the coin slot; and turn the coin clockwise to the closed position
marked on the back of the case.
Note: Battery replacement should be performed with extreme care to ensure the
Escape203 Electronic Altimeter continues to remain waterproof. It is the operator's
responsibility to due care to ensure the instrument remains waterproof.