When should you consider a C cell clock movement? The primary reason to use a C cell clock movement is longer battery life. Changing a common battery in your clock every couple of years is usually not a problem. But, when it’s in a hard to reach clock high up on a wall, or inside a case that’s hard to open or access, it can become a solvable problem. These larger C cell batteries simply store more electricity, so they last longer.
A C cell movement is larger than a AA battery powered movement. It has to be to hold the larger battery. If you have room for it in your case,