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? Is there a shifting mode where I can set up the rear derailleur to make automatic shifts to offset changing gears when shifting the front derailleur? How do I know when to charge the eTap® 2x11 derailleur or replace the shifter batteries? How long does it take to remove 2x11 eTap® shifter batteries? Comments 0 comments Article is closed for comments.