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. he SRAM eTap / AXS battery is the power source for the eTap system. The same power unit is interchangeable between front and rear derailleurs.It gives up to 1000 kilometers of riding per charge. Features: - Battery: Lithium Ion- Nominal capacity: 300mAh- Nominal voltage: 7.4V- Up to 1000 kilometers of riding per charge- Weight: 24g- Battery energy: 2.2Wh

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