The SRAM eTAP Battery Charger and Cord makes charging your eTap battery simple. 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.SRAM eTAP Battery Charger and Cord FeaturesEasy and fast charging for your SRAM RED eTap® batteries.A full charge takes just 45 minutes to complete.