KEMIMOTOLithium Motorcycle Battery YTX5L-BS/YTX4L-BS, LiFePO4 Lithium Battery 12v 2.5Ah, Pre-Charged Powersports Battery, with 2 Universal-Fit EVA Spacers, Compatible with Motorcycle ATV Jet Ski

Great value! Extremely light weight. Maybe a 1/3 of a conventional battery. Used on lawn mower, no issues and cranks better than a standard. Regarding price.. way better than a 90$ store powersports battery!

Fits my z900rs. Ok to start the first time I ordered this it got lost. Amazon was able to step in and send me another. When I bought the battery it was on sale and they sent me the new one for the same price and it came the next day so I'm very happy about that. The battery itself works great my Yuasa battery weighed in at 6.8lbs and the kemimoto 2.2 lbs pretty sweet. Cranks way faster. I'm happy with it.

I added a BY speaker and cell phone holder/charger. These drew too much electrical power and my bike wouldn’t start. I installed one of these batteries and the bike starts right up—even better than the old battery without the additional electrical requirements. I would highly recommend purchasing this battery. It IS exceptionally light in weight but packs a powerful charge!

Saw some of the negative reviews for this item. Not sure where they are coming from. They must not know how to install it correctly. When I went to fire up my bike after sitting several months plugged into a battery misery my old leaded battery would not turn over my Harley. It showed a charge of 13.2 amps and to be good. The indicator on the battery showed a flickering light at 90% so it was probably about 80% charged. I installed the new Kemi Moto and the bike cranked over and started immediately. I cant believe how small and lightweight the unit is. The included spacers make it easy to raise height and fill in the voids left with the smaller frame size. There are also terminals connections on both sides on the top to hook up the positive and negative easily. Also screw connections on multiple side of each terminal clock for easy hookup. I put the battery minder on it and it was charged to 100% in about 10 minutes. Great product - No complaints. As mentioned, not sure where the negative comments are coming from.

Says it fits my 2001 fz1 but it is not right. Too large

I like the weight, construction, the foam spacers provided and the multiple terminal mounting options. I was looking for a battery for my 2004 Sportster. I had an LED load equalizer module that was hard to fit under the battery side cover with the stock battery size. The smaller size of the lithium would help this issue. The BTX14L battery that was in there has terminals that are opposite from this battery. Since the lithium batteries are smaller, I was able to flip the battery around and the cables did still reach across the battery. I then used a foam spacer above the battery, then placed my load equalizer above the foam to keep them separate.

I bought the 4ah for my Harley Night Train (FXSTBI). The battery is 1/2 the size of my old lead acid battery and 1/10th the weight. Yes, 1/10th! And with 320 CCA, it cranks up my Harley like a champ. No problem. They include plenty of spacers, in the box, to fill in the space left in my battery box, with a new battery 1/2 the size of the old one. The "charge" indicator is a nice feature. They say lithium is "expensive" but, this batter cost 1/2 the price of the lead acid battery I bought 5 years ago (or so). I'm thrilled with this battery. It's newly installed so, we'll see how long it lasts.

I've had this battery in my bike since January and it's had no issues. Sitting for over a month, it held its charge no problem. The only thing to be aware of is that the battery terminals take an M5 screw instead of the usual M6 on the stock battery. I didn't receive screws with the battery, or they were lost in the packaging, and due to the size difference I couldn't re-use the screws from the old battery. I bought M5s at the hardware store to make it work, but I would have wanted to know about this difference before buying it, so here's this review for you.