HIFRESH K2 Energy K2B12V10EB 12V 10Ah Lithium Iron Phosphate Battery BMS

With its battery maintenance system, my regular charger works just fine. it is lightweight and has way more effective power than the lead acid batteries it replaced. At high discharge rates, a lead acid battery loses more of its capacity than a lithium iron battery. The result is that at the high discharge rate of the E Zip motor, the Lithium Iron batteries can do the work of about 1 1/2 lead acid battery packs, for way less weight (look up Peukert effect to verify this).I cannot at this point (perhaps five trips) verify the advertised life of 2,000 cycles. If it does even half of that, the money saved on batteries (let alone bus fare or parking) and convenience of not changing batteries will be enormous.I hope soon they will develop a drop in replacement for the U1 batteries I also use for my boat and scooter. That would be awesome.

Expensive, no instructions, could never get it to work. Not returnable.

I have used AGM type batteries in the past but they did not last long enough for my purpose. This battery has enough power to last over 5 hrs which is long enough with some to spare. It is much lighter than the AGM and worth the price since "failure is not an option" for me. Do not confuse this one with the other lithium batteries; these do not have the same problems. I also recommend the battery management system (BMS) since it is just a bit more and promises to lengthen the battery life. I have been using these batteries for over 3 years and they are still going strong. One caveat, the label on the one I just received says it is a 9.6 amp-hour battery.

Very good battery so far. I have been using sealed lead acid batteries until trying this. I use a higher amperage, 5-10 amps or so, which is higher than they were rated for. I think that caused me to get less use out of them. This battery is rated for something like 25 amps, so my use is well within the rating. I get almost 3 times the use out of this new battery than a sealed lead acid 8 amp battery. I have recharged it several times now just using some cheap charger I already had. When it runs out of power there is a very short period from full power to none. I am buying another.

The 3-year-old SLA battery pack in my  Currie Technologies eZip Men's Trailz Electric Bicycle  was in need of replacement, and I would have liked to replace it with  24 Volt RMB Lithium Ion (LiFePO4) LONG RANGE 9.6Ah Battery Pack & Charger Included for Currie, Ezip & Izip Electric Bicycles  rather than  Currie Technologies 24-Volt Bicycle Battery Pack, Black . But with a price difference of over $400, I thought I could do better...especially after seeing these "drop-in" lithium replacement batteries, which are charged by the same charger as the SLA batteries...unlike Currie's lithium batteries. These lithium iron batteries have the same voltage and AH rating as Currie's SLA batteries.To open the SLA battery case requires only removing 5 screws; inside are two 12-volt, 10Ah SLA batteries. Unfortunately, these two batteries do not "drop-out" as easily as new batteries drop-in; the wire terminals were soldered to the battery terminals. Fortunately I anticipated this and also purchased  Gardner Bender 20-145F 1 12-10 Gauge Yellow Female Terminal Disconnects, 16-Pack . I cut the connecting wires next to the old terminals and installed and connected the new terminals (this brand of terminals were initially too tight to fit the battery; however, by "stretching" the opening slightly with a male terminal of the same brand, they ended up fitting perfectly, and I saw no need to re-solder the connection.) An additional minor complication is that these lithium batteries are about 1/2" shorter than the SLA batteries, but I was able to make up the difference by adding a sliver of Styrofoam to the bottom of each battery.Lithium batteries maintain a more constant voltage as they discharge; as a result, for the first time, I had close to the same power at the end of my ride up a hill as I had at the beginning. By purchasing two of these lithium batteries, plus a package of terminals, and doing a little work, I saved nearly $200 over the price of Currie's lithium battery pack, and could not be happier with the way they perform.

This is all fact. Lighter,last longer,full power until drained,charge faster,enviro friendlier-only con is much costlier. However when I get more I do expect to pay more, in this case much costlier for just as much benefit. The LiPo batteries are "THE BOMB" Recommend!!

Great price and fast shipping!

These batteries work great in my E-Zip 450 scooter. On 1st trip went 12 miles and still had 2/5 ths power left. 1 year old lead batteries would be almost be gone after about 7 miles. The scooter is now almost 10 pounds lighter which makes loading into car easier also. If they don't last I will get back on here and let everyone know.