The SRAM battery is the power source for eTap or AXS components. The same power unit is interchangeable between front and rear eTap AXS derailleurs, Eagle AXS derailleurs, and the RockShox Reverb AXS seatpost.
Charges in 60 minutes or less
Lightweight (24g) and easy to transport
Same battery design for all AXS components and original SRAM RED eTap