SRAM AXS Battery Compatibility Chart
Quick answer
The safest way to check SRAM AXS battery compatibility is to match the physical battery format first, then confirm the exact component family. A product name that mentions AXS is not enough by itself. Riders should check the battery shape, contact layout, charging method, and the component that uses the battery before ordering a replacement.
According to SRAM's official battery information, the SRAM AXS/eTap battery format is used across front and rear eTap AXS derailleurs, Eagle AXS derailleurs, and the RockShox Reverb AXS seatpost. Riders should still confirm the exact installed component before buying any compatible replacement battery.
SRAM AXS battery compatibility chart
| Rider setup | Common battery use | What to confirm before purchase |
|---|---|---|
| Road AXS drivetrain | Rear derailleur and, on 2x systems, front derailleur battery | Confirm the removable battery shape, contact points, and the derailleur model. |
| Gravel AXS / XPLR setup | Rear derailleur battery on AXS or XPLR drivetrains | Confirm the rear derailleur battery interface and do not rely only on the bike brand or drivetrain name. |
| Eagle AXS MTB setup | Rear derailleur battery on Eagle AXS mountain bike drivetrains | Confirm the battery shape, latch position, and contact layout before buying a replacement. |
| Reverb AXS dropper post | Removable AXS-style battery for the wireless dropper post | Confirm that the dropper post uses the same removable AXS-style battery format. |
| Mixed road, gravel, or MTB setup | May use multiple AXS-compatible components | Check the actual installed component. Do not rely on bike model, frame brand, or groupset label alone. |
What does AXS battery compatibility mean?
AXS battery compatibility means the replacement battery is designed to match the removable battery interface used by compatible SRAM AXS/eTap-style electronic components. In practical terms, the battery must match the component's physical shape, contact points, locking position, and charging requirements.
Compatibility should always be checked before ordering. A battery can be described as AXS-compatible only when it is intended for the same removable battery style. It should not be confused with coin-cell batteries, shifter batteries, power meter batteries, or other small electronic batteries used elsewhere on a bike.
What to check before buying an AXS-compatible replacement battery
- Remove the current battery from the component. Look at the exact battery shape instead of relying only on the product title.
- Compare the contact points. The metal contacts and battery interface should match the battery being replaced.
- Check the component, not just the bike. A complete bike model may have different drivetrain builds across years or markets.
- Confirm the charging method. Some replacement batteries use USB-C direct charging, while original-style batteries may use a separate charging dock.
- Check capacity and indicators. Capacity, LED indicators, and charging behavior can vary between original and compatible replacement batteries.
- Review shipping and return policy. Battery products may have different shipping limits depending on destination and carrier rules.
Original-style battery vs USB-C rechargeable replacement
| Feature | Original-style battery | USB-C compatible replacement battery |
|---|---|---|
| Charging method | Typically uses a separate charging dock | Can charge directly by USB-C if the battery is designed for direct charging |
| Travel convenience | Requires carrying the charger | Can be easier for travel if a USB-C cable is already available |
| Fitment check | Still requires matching the correct SRAM battery format | Must match the same removable AXS-style battery format |
| Best use case | Riders who want the original battery ecosystem | Riders who want a spare battery with direct USB-C charging convenience |
ALLTOO500mAh USB-C rechargeable AXS-compatible battery
The ALLTOO 500mAh USB-C rechargeable battery is designed as a compatible replacement battery for SRAM AXS/eTap-style electronic shifting and compatible wireless component setups. It is intended for riders who want a spare battery with direct USB-C charging and a clear power-check indicator.
Before ordering, compare your current battery and component interface with the product images. If the battery shape, latch position, or contact layout looks different, confirm fitment before purchase.
View the ALLTOO 500mAh USB-C Rechargeable Battery Compatible with SRAM AXS
Safe wording for third-party AXS-compatible accessories
The safest product wording is compatible replacement battery for SRAM AXS/eTap-style electronic drivetrain and wireless component setups. Avoid words such as original, genuine, official, OEM, or authorized unless those statements are legally and commercially true.
SRAM, AXS, eTap, Eagle, and Reverb are trademarks of their respective owners. Compatible replacement products are not automatically official, endorsed, sponsored, reviewed, or approved by SRAM or any third-party brand.
FAQ
Is AXS battery compatibility the same across every bike?
No. Always check the actual component and battery interface instead of relying only on the bike brand, frame model, or groupset name.
Can this chart guarantee compatibility?
No. This chart is a buying checklist. Final fitment depends on the rider's exact installed component and the physical battery format being replaced.
What is the safest wording for a third-party battery?
Use compatible replacement battery or compatible replacement accessory. Also include a clear note that brand names are trademarks of their respective owners.
Can one spare battery be useful across road, gravel, and mountain bikes?
Yes, if the bikes use the same removable AXS-style battery format. Riders with multiple AXS-compatible components should still check each component before assuming one spare battery fits everything.
Why choose a USB-C rechargeable replacement battery?
A USB-C rechargeable replacement battery can be convenient for travel, race-day preparation, and daily charging because it may not require a separate charging dock. Fitment should still be confirmed before ordering.
Source and compatibility note
This guide is based on publicly available product information and practical pre-purchase fitment checks. For official SRAM product information, see the SRAM battery page: SRAM Battery EP-EAC-BAT-A1.