What keeps the eTap® derailleur battery from falling off? November 26, 2019 17:22 Updated The batteries are attached to the derailleurs by a tool-free latching mechanism. Related articles Does SRAM recommend carrying a spare eTap® battery (or batteries) when going on a long ride? What are the eTap AXS power indicator levels and how many hours of riding can I expect to get on a full charge? How long does it take to remove 2x11 eTap® shifter batteries? Does the eTap® battery charger come with the proper A/C power adaptor for my country? Do I need to do anything different when washing a bike with SRAM RED eTap? Comments 0 comments Article is closed for comments.