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.
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.
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!
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.
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.
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.
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
Just needed a spare just in case. Good price.
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.
I got another battery for when I go for some really long rides up in the hills. Just a peace of mind purchase an easy charge too.
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.
My current bike has sram batteries. On a minimum of 2 occasions I have had my battery die on me due to my forgetfulness to keep them charged. So I purchased a "backup" battery to keep in my saddlebag for those moments. It also helps me to remember to charge my existing battery!
Bought as a gift for someone who appreciates having a spare.
The only weak spot, as mentioned numerous times, is the tab holding the battery in place. Use super glue sparingly to repair. Has lasted several years on all three batteries.
No matter what I did, the tabs on my eTap batteries would crack, break and would eventually fall. I went through 10 of these batteries on 2 different bikes.
Tried to use electrical tape where the plastic comes in contact with the metal part on the derailleur, tried glue as a preventative measure, tried to avoid any bike cleaning products, but I always ended up with using rubber bands to secure the batteries, because the tabs would break.
The SRAM Red eTap system is terrific and the battery can power things for quite a while between charges - if you run down in the rear, it just takes moments to swap with the front to finish your ride BUT the plastic tab on the battery is fragile and can chip or break off so be careful when inserting the battery into the bike or charger - a small 'price to pay' for an otherwise wonderful shifting system.
Good deal
These batteries and the efficiency of the SRAM Electronic shifting system is impressive. I use mine on a new AXS system. I keep a spare with me on all of my longer rides but Ive never had to use it. Im pushing 50 hours of riding on the last full charge and all lights are still green! No complaints!
