How long do Rival eTap AXS shifter batteries last? The CR2032 shifter batteries used in all eTap AXS electronic drop bar shifters will last about two years under normal use (estimated at 15 riding hours per week). 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 far can I ride on a fully charged Rival eTap AXS derailleur battery? Are SRAM AXS controller (shifter) batteries replaceable? How many hours of riding can I get from a fully charged AXS™ derailleur battery? Is Rival eTap AXS compatible with SRAM RED or Force eTap AXS parts?