SRAM eTap / AXS Battery

Everyone riding SRAM AXS should carry a spare battery with them, do yourself a favor and buy an extra before you learn the hard way out on the road or the trail. Also, do yourself a big favor and buy original equipment and don't mess with a knock-off battery, not worth the risk.

Buy them on sale and don't forget to remove them if you are traveling with your bike out side on the car or truck. If you only have two batteries on your bike then you should buy a couple more. Don't buy knockoffs, only buy SRAM AXS batteries. :)

Wanted extra batteries just in case they are needed on one of my ultra events.

I works. I rotate it in with my other two batteries on the bike, so have only used it for one cycle. It is a little expensive for such a small battery and just in case spare battery. Wireless shifting is so much better. I have it for my 2x12 SRAM rival wireless. During the season of 2023 I was on two different rides where another rider had to cut their ride short due to a dead SRAM derailler battery. I can't remember that last time a cable broke on a ride However it did happen to me a couple of years ago, but was able to mod it to get me home.

Bike tires direct never disappoints

These batteries are small enough to fit in a saddle bag, so worth the security of a spare.

Very expensive for a battery, but this is the price most anywhere! But now to the review. Could you get by with only the two? Sure......if your rear goes out you can swap the front which is needed less and one can have a gear range to finish a ride. However, having both derailleurs working with a spare or even two is best for very long rides. Hold do they hold a charge and perform? Well, my usual 20 mile rides daily I get up to 7-8 rides of changing the rear anywhere from 180-250 times. The front, I get longer on but only change typical 10 times per ride. This kind of shows the battery life to those wondering. I see a lot of post on broken connectors and tabs??? I wonder sometimes if people change in haste by "monkey fisting" these things rather than taking your time which in all reality is like 5 seconds to change out??? So are they worth it? Yes......unfortunately you have to drop $60 on something SRAM has to produce these at maybe $5 each and in all reality should only be like $20 tops!

The batteries don't last all that long in the Mountain bike maybe 20 hrs. I have XO AXS, I did have a battery go dead on a ride. The light was GREENat the start of the ride. This one is going to be a spare I keep, in a storage pack, on the bike as an extra.

We recently got a new tandem bike with the SRAM eTap drivetrain. We absolutely love the new system, with just one chainring and 12 gears, ranging 10 - 52. The battery charge is supposed to be good for 25 hours, but we decided it would be a good idea to carry a spare battery during multi-day bike tours. The spare battery is small and easy to carry in a bike bag or pocket of a hydration pack. Glad the Bike Tires Direct had it in stock.

SRAM batteries come and go without any warning. It's good to have a spare. Thankfully SRAM has not changed the interface in any of their AXS systems so all batteries work the same. They are rather expensive, though, for what you get.

Bought an additional for longer rides or in case the first battery drained while riding but it's been more than a month and +3 rides a week and derailleur still flashes green so 5-8 extra hours minimum. Still a good idea to have a 2nd one. Just in case.

A must if you run Axs components and having one in the saddle bag is also a must. Yes if you run a 2x then you could always switch but not many bikes these days run 2X So I keep one in the saddle bag for those special occasions.

If you have electronic shifters that use batteries, this is a must have. Biketiresdirect always has great prices and great customer service.

Great to have a spare in case you forgot to charge the others in a while. They do lose some charge sitting in your seat bag though but top off quickly.

BTD insists that I file a review for a SRAM battery. So here it is...

This battery doesn't make anything special happen. It doesn't win friends or influence people. This battery (#3) just sits in my saddle bag waiting for Battery #1 or Battery #2 to die. Since I now have a spare, I expect I will never experience a dead battery out on the road. If I didn't buy a spare, #1 or #2 would die 40 miles from my house on the rainiest coldest day of the year.

That's how good this battery is. It sits in my bag and wards off death of other batteries.

I carry an extra battery with me when I ride. My front deraileur battery lost power on a ride and if I had the extra battery it would have been an easy fix. Small and light weight, just add it to your saddle bag.

SRAM advertises that these are supposed to keep a charge for a very long time but in my experience i'd rather not be stuck in a certain gear so i'll take the weight penalty and keep this with me

The Sram Red eTap batteries hold a charge for many rides (I think Sram notes that they should last 600 km and I think I've been able to exceed that) and they have survived for a couple of years of hot summer and cold winter riding, much of which was on chipseal roads. However, recently I've had to replace a couple of them as the tabs that fit into the slot on the derailleur have broken off, no doubt due to the extreme temperature changes and the vibration caused by the road surfaces. It is also important to remove these batteries when traveling long distances with the bike on a bike rack as the derailleurs recognize the motion and keep the units on which will discharge the batteries.

Just needed a spare just in case. Good price.

An inexpensive way to ensure your MTB is fully charged and ready to ride. I keep a spare battery in the charger so there is a fully charged unit when needed.