MRX Solutions 2 Replacement Batteries for Sram AXS, for eTap Eagle XX1 X01 GX Reverb Force Rival Red XPLR, Just The Battery

I own a MTB and Gravel bike both run Sram AXS. Each came with a SRAM branded battery. I also have a road bike with Shimano Di2. The Di2 battery lasts months while the SRAMs run about half of that. But the SRAMs are easier to remove and cheaper to replace. Although these MRX versions are much better value. Due to the shorter battery life I needed to start carrying a back up. Found these and saw decent feedback and have had no issues so far. Some claim these do not last as long as the SRAM branded batteries. My guess is they likely come from the same factory. I have not conducted any rigorous testing to determine if they are better or worse but for the much lower price it is a no brainer to have 3 or 4 of the MRX on hand.

I decided to wait several months before writing a review so that I could truly test out these batteries.I use them on my mountain bike which has a GX Eagle AXS derailleur and my gravel bike which has an Apex AXS. Both bikes get regular use in upstate NY in which they have seen temps in the upper 40s to 90s. Although I dont aim to ride in very wet conditions or rain I have been caught in both in which the batteries have handled those muddy/wet conditions well.By my own mistake I did leave battery out on my driveway for 24 hours in which the daytime temp was over 90* (the blacktop probably was much hotter) in which the battery swelled enough that the case bulged and I deemed it unusable.The charger has worked well and seems to work just like the SRAM one. I tend to just charge the MRX batteries on its charger and the SRAM battery on its own. That said, one of the two batteries wouldn't get past the yellow color on the SRAM charger but when I put it on the MRX charger it would charge without a problem. Both batteries hold charge fine but that is hard to say how long they will last compared to the stock SRAM batteries as gear changing is a very subjective thing based on the rider and the route.Overall - when I first got these batteries I carried one as a backup to the stock SRAM battery. I then moved to running one of these MRX batteries and carrying the stock SRAM battery as backup. Now, I generally dont carry a backup battery and happily ride hundreds of miles on the gravel bike and mountain bike with a charge about 1-2x monthly just to be sure. I wouldn't think twice about ordering more of these batteries and plan on it if/when needed down the road. Just a word of caution to not leave them exposed to direct sunlight/heat for an extended period of time!

First time writing review. Ordered pair of batteries for sram bikes. Using original Sram charger.One battery shows orange light, it never turns green. After a while I see no lights on charger.Second battery shows red light when I plug it. Tried two chargers, replugging cable multiple times - same red light, indicating battery failure.Sram charged shows solid blue light = adequate power from my power brick.I can see one battery failing, stuff happens. Two failed batteries look like a pattern to me.

I had to return the first set because one of batteries wouldn't charge. Second pair work perfectly and so far they last longer than the SRAM batteries that I've been using for 2 years. We'll see how they fair long term but so far no complaints.

Works well

I was a tad skeptical about these batteries given the price and a few negative reviews. Since the OEM battery was much more expensive AND would take several weeks for delivery I decided to take a chance on these. While I've only ridden about 90 min so far on the new battery and can't comment on battery life, the charging was fine, as is fit, and there is no indication the battery will last significantly shorter than the SRAM.The peace of mind to have a back up is well worth the ~$30 delivered for two spares. I now have a fully charged SRAM battery in my saddle pack and am running one of the MRX batteries in the derailleur. Here's to no more delayed or disrupted rides as a result of a dead derailleur!

I bought these so I can have a spare on my rides. I've had them for a couple years, and I can't tell the difference from OEM.

Used this as a backup battery for my sram AXS and it has now utterly and completely failed on me. Thought it just needed recharging but after overnight on the charger it doesn’t hold a charge at all. Run, do not walk, away from this battery. I’ll have to bite the bullet and purchase a new SRAM OEM battery. This brand is worthless.