Are the front and rear derailleur batteries interchangeable? April 15, 2021 13:36 Updated Yes. Additionally, shifters use one CR2032 coin type battery each. Related articles How do I know how much battery life is left on my derailleur or shifter battery before I go out for a ride? How do I charge Rival eTap AXS derailleur batteries? How far can I ride on a fully charged Rival eTap AXS derailleur battery? What 2x X-Range Rival eTap AXS gearing options do you recommend for someone who is making the switch from a typical 2x11 setup? What are the main benefits of the X-Range gearing configurations for Rival eTap AXS? Comments 0 comments Please sign in to leave a comment.