DESCRIPTION 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. FEATURES Charges in 60 minutes or less Lightweight (24g) and easy to transport Same battery design for all AXS components and original SRAM RED eTap does not come with charger