How long does it take to charge an AXS battery? November 09, 2020 20:35 It takes approximately one full hour to charge a SRAM AXS battery. Related articles How do I know if my Battery is low? How long does it take to charge eTap® derailleur batteries? Why is my SRAM Force eTap AXS drivetrain noisy, especially the cassette? How do I know when to charge the eTap® 2x11 derailleur or replace the shifter batteries? Are 11-speed SRAM RED eTap derailleur batteries compatible with SRAM RED and Force eTap AXS derailleurs? Comments 0 comments Article is closed for comments.