Is there a different battery for the new SRAM RED eTap AXS 36T Max rear derailleur? October 16, 2020 21:38 No, the derailleur uses the same battery design for all AXS components and original SRAM RED eTap. Related articles Are the frame fit specs for the SRAM RED eTap AXS 36T Max rear derailleur different than the existing SRAM RED eTap AXS derailleur? Where can I find the frame fit specs? Comments 0 comments Article is closed for comments.