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? How long does it take to remove 2x11 eTap® shifter batteries? Battery Drain - Battery Drains In Under 30 Days What is the Overload Clutch? How many eTap® Blips can be plugged into a BlipBox? Comments 0 comments Article is closed for comments.