Note: Stages Power R9200 and R8100 right-side power meters use a different battery cover than Stages Power R9100 and R8000 right-side power meters. The instructions for changing the battery, however, are the same.
Required: Small Phillips head screwdriver.
Using a small Phillips head screwdriver, remove battery cover screws (turn counter-clockwise).
Remove the battery isolation tab from the battery compartment (new power meter), or lightly press the battery to release it from the battery case (existing power meter).
Place the new battery into the battery case with the positive (+) side facing up. Replace the battery cover and screws and tighten until snug. Do not over-tighten the screws as this may damage the battery case.