Do I need a tool to remove the eTap® derailleur battery? November 26, 2019 17:22 Updated No. Batteries are removed using a tool-free latching mechanism. Related articles How do I know when to charge the eTap® 2x11 derailleur or replace the shifter batteries? What happens when an eTap® derailleur battery runs out of charge? Where does the derailleur stop? Does SRAM recommend carrying a spare eTap® battery (or batteries) when going on a long ride? How do I trade in my SRAM RED AXS 2x power meter road chainrings when they wear out? Are the eTap® shifter batteries rechargeable? Comments 0 comments Article is closed for comments.