did they solved the broken tab issue I have 4 battery’s all broken at the same place ?? the small tab broke up

I am hoping as I am buying a new one now. That said, I have only had one tab break since 2015. Not sure if recent failure is 5 years old or 2018 replacement. I suspect these come from China factory where engineers get paid to use less material; hence no radii at sharp corners where higher stress occurs.

Does anyone know what type of battery this is? lithium ion? nimh? nicad?

It's a Lithium Ion. I've been using them for a few Cycling Seasons. I carry a couple spares, but yet have not needed to swap out during any of my Century Rides and I do a lot of shifting during a day ride. During season I always keep Batteries Charging to be readily available. I ride in approx. 6+ century rides each cycling season, additionally I ride each "off" weekend and have yet to have battery issue.

Can i used this battery with my 12 speed eagle axs mountain bike derailleur?

Yes you can. I have Eagle AXS and the battery works fine.

Will this work with the new sram axs system?

Yes. It works fine with AXS. I have both and the battery is exactly the same as the one that came with the group and fits and functions perfectly.

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SRAM eTap and eTap AXS Battery | bike-shifters-and-parts

Product ID: 29100666

Details

Battery Capacity
389 Milliamp
Battery Cell Composition
Alkaline
Brand
SRAM
Number of Batteries
1 Unknown
Unit Count
1.0 Count

⚡60-min fast recharge

🔋389mAh high-capacity power

🪶ultra-light 24g weight

$126.50

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Description

🔋 Power your ride, own the trail—never miss a shift!

LIGHTNING FAST RECHARGE - Get back on the road in under 60 minutes with rapid charging technology—minimal downtime, maximum ride time.
POWER THROUGH EVERY RIDE - High-capacity 389mAh battery keeps your SRAM AXS components energized for longer adventures.
FEATHERWEIGHT PERFORMANCE - At just 24 grams, this battery adds virtually no extra weight, preserving your bike’s agility and speed.
BUILT TO BRAVE THE ELEMENTS - Durable terminal cover shields against dirt, moisture, and debris, ensuring consistent, reliable connectivity.
SEAMLESS SYSTEM INTEGRATION - Compatible across SRAM eTap, Eagle AXS, RockShox Reverb AXS, and Flight Attendant systems for total electronic control.

The SRAM eTap and eTap AXS Battery is a lightweight, high-capacity lithium-ion power source designed to deliver reliable energy to all SRAM AXS electronic components. With a rapid 60-minute recharge time and protective terminal cover, it ensures extended, uninterrupted riding sessions across multiple SRAM systems, making it an essential upgrade for serious cyclists seeking performance and durability.

Specifications

ASIN	B0186OPWJA
Amperage	1.5 Amps
Battery Capacity	389 Milliamp Hours
Battery Cell Type	Alkaline
Battery Weight	24 Grams
Best Sellers Rank	#23,193 in Health & Household ( See Top 100 in Health & Household ) #1 in Wheelchair & Mobility Scooter Replacement Batteries
Brand	SRAM
Built-In Media	Electronic Shifter Part, SRAM
Customer Reviews	4.8 4.8 out of 5 stars (1,348)
Global Trade Identification Number	00710845780615
Item Dimensions	9.5 x 1 x 5 inches
Item Weight	0.12 Pounds
Manufacturer	SRAM
Model Name	AXS/ETap
Model Number	00.3018.102.000
Number of Batteries	1 Unknown batteries required.
Reusability	Rechargeable
UPC	710845780615
Unit Count	1.0 Count
Voltage	12 Volts
Warranty Description	Limited Warranty

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