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.

eTap batteries are literally a snap to remove and charge.
Just flip the tool-free battery latch up and slide the battery up and out of the derailleur. Then snap the battery into the USB powered charger and connect the charger to any USB power source or A/C USB adaptor.
A full charge takes just 45 minutes to complete.
The scope of delivery does not include the battery.

Compatibility: Compatible with SRAM eTap / AXS batteries, only. Not compatible with products of other manufacturers.