Mighty Max BatteryYTX20L-BS - 12 Volt 18 AH, 270 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery

I use these batteries for starting in a stand-by generator (they have good CCA for their size). They work great and hold charge well for a long time. They can be mounted upside down, on their side etc and they are completely sealed (thus no gassing). They are absorbed glass mat (AGM) sealed lead acid (SLA) batteries. They are NOT gel batteries. They might slosh around a little tiny bit because of they contain just enough of the electrolyte to keep the glass mat wet but meh, that's fine, mine don't slosh at all except in extreme temperatures. True Gel batteries tend to be a bit prema-donna sometimes so I've found over time, these batteries do just fine and will work with any god awful charger.Pro-tip: I replaced my Mighty Max battery in my generator after 5 years when I thought it was dead because the battery tender wouldn't charge it anymore. Come to find out, it wasn't the battery, it was the tender. The original battery is still just fine after 5 years! Always check the tender before relying on it to make a decision on a battery. I should have known better and got lazy. That said, I just put the new one in the generator and kept the 5 year old one around to use for different projects until it finally gives up the ghost. If I get 5 years out of each of these on average I'll be doing just fine!

Very affordable. Works great right out of the box. I have had no issues since putting it in my Honda motorcycle, bike turns over and starts every time. Installed with no issues. The battery is not super heavy.

Amazing cranking power in a small and completely seal package, came 90% charged. Don't buy a standard lawn mower battery, they lose their cranking power fast, this is far superior technology. Installed on a cub cadet 42 inch zero turn and now it starts instantly because of the increased cranking power. Can't comment on longevity because I just got it but Mightymax appears to make a quality product that they stand behind. Very happy with the performance of this battery, it was a great purchase, I recommend it.

Ordered 2 and they seem to be working fine. They have enough power to crank over fine and start pretty quick like normal on our 2 different 4-wheelers. No clue how long they’ll last at this price point but we’ll see.My only complaint is the company’s quality control because one of the batteries arrived in not perfect condition. The positive post was bent very close to being unusable. Both the company’s box and the shipping box were in perfect condition so the battery had to have been placed in the box with the bent post. I was barely able to get it bent back to a usable state and thankfully it was able to be used. I would’ve had it replaced but didn’t feel like dealing with the return process so I just fixed it best I could.Also the included hardware for attaching the cables was complete garbage quality, the anchor nuts spun in the posts and basically crumbled into pieces to the point I had to reuse the old hardware. Just so things to keep in mind if I decide on buying these again

I wanted to share my recent experience with motorcycle batteries. Over the past three years, I spent an extra $30 to $40 per battery each year on a box store brand, mainly because I didn’t have electricity in my garage to keep the battery charged with a trickle charger. Living in Ohio, I expected a battery to last through a winter, but I was left feeling underwhelmed by the box store option.After some enthusiastic research, I discovered Mighty Maxx, a highly rated alternative that is both affordable and seems to outperform my previous batteries. I decided to give it a try, and I’m thrilled I did! This battery is the same size as the one I used before, but it offers more cranking amps—both regular and cold. Right away, it started my bike effortlessly! I’ve only had it for a few weeks, but so far, it’s been absolutely reliable. I'm excited about this find and confident it will serve me well!

Amazon states that this works in a 2015 E350 Mercedes-Benz. I cannot recommend that you purchase this for it. I did manage to make it work,, the battery terminals are reversed from factory's, cables barely reached.If you think about how much cheaper it was then the other batteries if I get length of time out of it it was a darn good deal.And I was able to use this battery to make sure that yes I need the battery...Just if you ain't talented and mechanically inclined don't try to put this in a Mercedes-Benz E350 2015..

Item was in stock, priced right, shipped and delivered as expected and is of good quality. Would buy from this seller again.

I replaced the auxiliary battery A0009829608 on my 2015 Mercedes CLA250. The cars eco on/off at stop lights kept dying completed and had to restart the car so then got Auxillary Battery Malfunction warning. It’s exactly the same size and fits with the cover snapped. Only paid $39.95 and MB online wanted $165 plus shipping. Looks nice and well packaged. The reason I didn’t give it 5 stars is because 1) it has no vent hole so the tube from the car can’t be used 2) the terminals are not a solid piece of metal that is treaded for the bolt. Instead it comes with two rectangular threaded plates and what should have taken me 5 min to change took me 30. First I thought the plate fit snuggly one direction but instead it is perpendicular and loose. Second as it is loose it can’t stay in place and under the dash is tight and goes in at an angle. I had to use my McGyver skills to wedge a rolled up piece of paper in each to push the plate and center it. Then once threaded a few turns I pulled the paper out. Worked awesome. TIP: remove the cabin filter cover before removing this battery.