Mighty Max Battery YTX20L-BS - 12 Volt 18 AH 270 CCA Rechargeable Maintenance Free SLA AGM Motorcycle Battery

Excellent Quality at a Great Price! I used the Mighty Max YTX14-BS battery as a replacement battery for my dad’s 2023 Honda Pioneer 700-4 side x side UTV. It is a perfect fit and performs absolutely Excellent. I Highly Recommend Mighty Max Batteries for your replacement needs! Read more

Decent quality for the price. It is a cheap battery and don't expect too much more than 3-4 years. The quality could be better and it could last longer. For meeting this price point at the performance given, its a 5 star battery. Read more

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! Read more

This battery turned out to be a perfect fit for my 1984 Honda Goldwing. It dropped right into the OEM battery mount with no adjustments needed, and the polarity lined up exactly with the factory wiring. That alone made the install quick and hassle-free. Out of the box, it arrived fully charged (12.95v on the meter), which meant I didn’t have to trickle-charge it before use. The packaging was solid enough to protect it from minor bumps in shipping, and there was no damage when it arrived. The overall build quality seems decent, though of course the real test will be how it holds up over time. The real proof came when I hooked it up—my Goldwing had been sitting for over 21 years, and this battery was strong enough to fire it up right away. That alone speaks volumes about its reliability. So far, I’m very satisfied with this purchase. If you’re looking for a direct-fit replacement that works right out of the box, I’d recommend this battery. Read more

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! Read more

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. Read more

Great fast shipping from supplier, had it in three days; battery just as described, perfect fit in my motorcycle. Came fully charged, bike started on first touch of the starter button, fantastic! I like the high CCAs from the battery as well. Read more

I am only leaving a 4 star review because amazon told me this battery would fit my 2006 Buell Blast. But while the battery will obviously power the bike, it is actually too large for the seat to actually go over the battery. So i cant actually latch my seat onto my motorcycle. Amazon should update this because it is too large for the space underneath the seat for that motorcycle. Other than that the battery works fine and i don't believe i have bad any issues. Decent value as well. Read more