SRAMeTap / AXS Battery(Return to Product Page)

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.

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.

I ordered this as an extra for bike packing. Super easy to throw in a pocket to be sure youre never left without shifting or a dropper post.

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

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.

Bought as a gift for someone who appreciates having a spare.

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.

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!

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!

This is the only battery of SRAM Red eTap deraillieurs. The battery works well, but the tab securing the battery to the deraillieur is fragile.

Easier shifting when on the drops.

Expensive but on a very light XC racing build this is key. Super reliable. Long life and an extra battery is just insurance in a long race.

it's a battery. you need it for your etap groupset.

Battery went bad after 1 week. BikeTiresDirect was great and sent a new one within 3 business days

I purchased a �spare� battery in the event that I ran out of juice and was unable to shift. I�m very pleased with the performance and would definitely recommend them to others.

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.

I've never had a battery on eTap run out of juice on the road, but with some longer multi-day tours coming up (with no easy access to recharging), a spare seemed a good idea. I also carry an extra pair of CR3032 button cells just in case a shift lever battery goes out.