Replacement Battery & Red Covers

It works just like OEM. It fits just like OEM. I have seen no difference in battery life, and the AXS device does not know it is not a SRAM battery, all for 1/3 the price of a new OEM one. I bought this because I wanted a spare in case my battery ran out on the trail, or in case someone swipes my battery off the bike in a parking lot while locked to the rack (I have a possibly irrational fear of this happening). When my OEM needed charging, I threw this one on, and I notice absolutely no difference performance wise in any way compared to the SRAM one. In fact, this is such a "unique" battery design, I wouldn't be surprised if the same factory is making both. I can't find a reason to NOT buy these ones instead.

UPDATE: As I noted below in my original review "Time will tell". It did. Less than 4 months of use (switching back and forth between this battery and the original SRAM battery) and now this battery is so loose in my XX1 derailleur that the contacts come disconnected and my shifter randomly works. It still seems to hold it's charge, but their must be something slightly different in the plastic on this battery that has worn in this short period of time. Originally 4 star review below, but now a one star due to it not holding up and randomly working. I've utilized this battery for one 25 mile ride. It worked well over that duration. Verdict is still out on the longevity as compared to the original SRAM battery. I had no issues with this battery charging in the original SRAM charger and no compatibility issues on my xx1 derailleur. All worked seamlessly. If the longevity is not good it will still make a great back up battery.

I bought this as a backup to ensure I don't have an issue with my primary battery running out of juice when I'm on a ride. Charged no problem and worked as expected when I swapped batteries. I saw some reviews stating that this didn't have as long of a life as the original - which makes sense based on the price. If my SRAM battery dies, I'll prob just by a new OEM battery - but it doesn't seem to make much sense to pay full price for something that won't get anywhere near as much usage...

A

It does the job but after using it and comparing to Sram battery I’d say this hold slightly less charge than Sram.

Funciona a la perfección, y tiene mucha duración

Battery doesn't hold a charge, so therefore it's useless as a backup thrown in your bag for when you need it. Save your money buy oem

fit the charger and charged just fine ,fit the bike perfectly and runs the derailleur, I will ride with it soon and see how it holds up