Are 11-speed RED eTap derailleur batteries compatible with GX Eagle AXS and RED eTap AXS derailleurs? March 25, 2021 05:54 Updated Yes. Both groups use the same SRAM batteries. Related articles What is the max cog size that is compatible with GX Eagle AXS rear derailleurs? What type of clutch mechanism does the GX Eagle AXS derailleur use? Is it the same as the new RED eTap AXS derailleur? Can I fit SRAM GX Eagle AXS to any mountain bike and what are the compatibility requirements for GX Eagle AXS? How do I pair my AXS components together? Comments 0 comments Article is closed for comments.