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How to Change the Battery in the Varia Remote
Before you can replace the batter, you must have a small Phillips screwdriver, a small flat screwdriver and a CR2032 lithium coin-cell battery.
Using a Phillips screwdriver, remove the three screws from the back plate (1).
Remove back plate from remote.
Wrap the end of a small flat screwdriver with tape. The tape protects the battery, battery compartment and contacts from damage.
Carefully pry the battery from the back plate.
Install new battery into the back plate with the positive side facing down.
Verify the gasket (2) is fully seated in the groove.
Replace the back plate, aligning the post (3) with the gap in the circuit board (4).
Replace and tighten the three screws. Do not overtighten them.