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? Can I fit SRAM GX Eagle AXS to any mountain bike and what are the compatibility requirements for GX Eagle AXS? What type of clutch mechanism does the GX Eagle AXS derailleur use? Is it the same as the new RED eTap AXS derailleur? What is included in the GX Eagle AXS upgrade kit? What is the weight difference between RED eTap AXS™ and Force eTap AXS™? Comments 0 comments Article is closed for comments.