2.
A second screw is located inside the casing. It is marked red in the image. Undo
this screw using the PH1 screwdriver.
3.
Carefully lift the circuit board up at the edge opposite the sensor cable.
4.
Press the old battery out of the fixture using one of the screwdrivers.
5.
Press the new battery into the fixture. If required, use the screwdriver to push
the battery into place.
6.
Place the circuit board back into the casing.
Tighten the screw inside the casing as well as the two screws that fix the back
cover.
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