SRAM's eTAP and AXS systems are really powerful. Their batteries are easy, quick to recharge, removable and attached to the front derailleur and rear derailleur. Installation is a piece of cake without cables.
SRAM eTap / eTap AXS Battery
The SRAM eTap / AXS battery is the power source for the eTap system. The same power unit is interchangeable between front and rear derailleurs.
Up to 1000 kilometers of riding per charge.
