What type of batteries do the new SRAM RED and Force eTap AXS™ shift-brake levers require? One CR2032 per shifter. The same as the previous RED eTap™ groupset. See the shifter and controller battery replacement procedure here. Related articles Are SRAM AXS controller (shifter) batteries replaceable? How long do Rival eTap AXS shifter batteries last? Are 11-speed SRAM RED eTap derailleur batteries compatible with SRAM RED and Force eTap AXS derailleurs? How do I update firmware on my AXS components with the AXS Mobile App? Is Rival eTap AXS compatible with SRAM RED or Force eTap AXS parts?