The SRAM eTap / AXS battery is the universal power source that powers SRAM's wireless electronic drivetrain ecosystem. Compatible with all eTap, eTap AXS (11, 12 and 13-speed road), Eagle AXS (MTB) derailleurs and the RockShox Reverb AXS dropper seatpost, it embodies the philosophy of total interchangeability dear to the American brand.

Technical design and universality

• Absolute universality: One single battery for all original AXS and eTap components — front, rear, MTB, road, seatpost. No model or range distinction.
• Featherweight: Only 24 grams for discreet integration on your derailleurs, with no weight penalty.
• Fast charging: Rechargeable in 60 minutes or less via micro-USB (AC adapter or standard USB port). No complex management, automatic shutdown at end of charge.
• Tool-free mounting: Ultra-simple clip-lock system — one click to install or remove the battery in 2 seconds, even during a race.

Autonomy and power management

• Road: Up to 60 hours of riding in typical use (depending on shifting frequency), meaning several weeks for a regular cyclist.
• MTB: Approximately 20 to 25 hours in real conditions, depending on shifting intensity (Eagle AXS use).
• Intelligent LED indicator: Light signal after each shift — green above 25% charge (15-60 hours remaining), red below. Monitoring also available via AXS Mobile app or compatible GPS computers.
• Hot-swap: Dead battery on a ride? Swap front/rear instantly to get home, or slip a spare battery into your jersey pocket (ultra-compact format).

Reliability and SRAM ecosystem

Designed to withstand the harshest conditions, the AXS battery ensures consistent shifting performance regardless of remaining charge level — no slowdown, no hesitation. The included protective cap protects the contacts against dirt, moisture and debris during transport or storage, while providing a convenient charge indicator.

Whether you ride RED, Force, Rival eTap AXS on the road, XX1, X01, GX Eagle AXS on MTB or with a Reverb AXS seatpost, this rechargeable lithium-ion battery represents the energy heart of your wireless system. For long rides, ultra-cyclists or simply peace of mind, having a spare battery in your saddlebag is the guarantee of never being stuck in a single gear.