SRAM 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-C powered charger and connect the charger to any USB-C power source. A full charge takes up to 60 minutes. Details: Model No: AC-EAC-BC-A2 Easy and fast charging for your SRAM batteries Battery sold separately USB-C cord not included Compatibility: Battery: SRAM AXS / eTap Batteries