When the battery indicator on your shifter starts blinking red, you've got about 100 shifts left before the system stops responding. That's enough to finish a ride, but not enough to start the next one with confidence. This replacement battery fits all eTap and eTap AXS derailleurs and shifters, giving you a fresh 60-hour runtime to keep in your saddlebag or drop into a depleted component.

The battery design hasn't changed since the original eTap launch, which means one battery works across the entire wireless ecosystem. Front derailleur, rear derailleur, shift levers, Blips, AXS dropper remotes—they all use this same unit. That interchangeability matters when you're on the road and need to borrow power from one component to keep another running. Pull the battery from your left shifter, pop it into your rear derailleur, and you're back in business until you can get home and charge everything properly.

Runtime depends heavily on shifting frequency. SRAM's 60-hour estimate assumes typical riding patterns, but criterium racers burning through gear changes will see shorter intervals between charges. The LED indicator on each component shows battery status with a quick button press—green means good, red means charge soon, blinking red means charge now. Most riders find that charging every few weeks keeps everything in the green zone without having to think about it.... Read More