The Quarq Red, Elsa, Riken powermeters have simple battery compartment access for changing the battery. Inevitably a cap may get damaged, stripped or straight-up lost. Fortunately, Quarq keeps a replacement available.

This aluminum cover provides water-tight protection for the battery compartment, and is designed to work with the listed cranksets prior to the ADX revision of 2015. Please check you crankset before purchase to ensure compatibility.