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

I think these are the best motorcycle batteries on Amazon. They are a high quality perfect fit for both of our Goldwings and deliver more than ample power to start them even down to 20 degrees. That are a true gel cell battery that will be there whenever you need it! They are even better in price all things considered.

Service center wanted to charge an arm and a leg to replace my i3's battery (the 12V one, not the main one.) Turns out the battery is 100% proprietary (because... BMW), so you can't find it for a good price online or find it AT ALL at local shops, nor do any 3rd parties make one. Worse yet, rumor has it on forums that BMW's OEM batteries suck. They have poor cold performance and a short lifespan, despite the high cost.Well, after taking measurements and trudging through *battery after battery* manually, I finally discovered this one! Not only does it exceed the CCA and capacity of the original, but it even looks hella cool in the process.Amazon was sure to warn me this wasn't "compatible with my car," but I am not known for taking the conventional route. However, I am happy to report that aside from some minor tweaks to the BMW proprietary L-bracket(tm), namely several extra washers, it fits flawlessly, including the OEM battery terminals. I've had it installed for two months now and safe to say it's been working flawlessly.I am leaving this review for anyone who may happen to have an i3 or other BMW with the same battery in need of a replacement, because it certainly wasn't easy to find.

So far so good it seems to be a very good battery but only time can really tell. This battery went inside my Suzuki M-109 r 1800 special edition.

Arrived in good condition, fully charged and ready to go. Battery was fine as batteries go, it either works or doesn't. The negative was the longevity; battery started to not fully charge within a couple months, after 5 months the battery is totally dead. Kept it on a tender and it doesn't hold charge, doesn't charge at all, it's like a cell totallyfailed after less than 6 months. Wasted my money on this, should have bought a more reputable brand.

I purchased a new “used” motorcycle to me and needed a new lightning box to get it started. I looked at many different batteries at big box stores and Amazon and came to this one. From not even needing dimension from my old battery I ordered this one for the cost and the fact it was a gel battery. Installation was simple although I wish it has threaded posts instead of the nut and bolt setup, but this was done in case your battery cables needed to be mounted on the side or top. First crank was great, as well as the rest so far. Battery has been in about a month and so far no complaints at all. Cca was just as expected and my bike starts with no issues. I would buy this again!EDIT 2 month update: after about two months the battery gave out on me. Wouldn’t start my bike after sitting for about a week. I contacted the company and they sent me a new one without returning the old one. I keep this on a trickle charger we’ll see if I got a betterOne this time

So far so good.

Everything went and worked as expected

Easy installation. Great value for money, fits in my 2016 harley-davidson, 883 sporster. Good battery replacement. As for Durability I'll let you know after winter. It's on a trickel charger for the winter.