48V13Ah Ebike Battery, Lithium Battery for 250W 350W 500W 750W 1000W Bicycles Motor, with XT60 Connector, Battery Base,Safe Lock, Led Indicator Light(UL Certification)

Ok, but fair warning that my kit's ad stated: "All the buyers should have experience to install it. If not, please do not buy it." And not only were there no instructions, all of the English labels on the wiring were wrong lol, so not very hard if you are a diy'er just factor in a half an hour of holding things up and saying "how's this connect?!" :) My kit's no longer on Amazon but here's what looks like the exact same thing: https://www.amazon.com/Electric-Brushless-Conversion-Tricycle-Controller/dp/B0FKN89TC8 I went with this battery: https://www.amazon.com/TLALVG-Bicycles-Connector-Indicator-Certification/dp/B0GTP9WXND?th=1 Finally, you are going to need an adaptor to go between the free spinning wheel and your rear axle, and I can't tell you which one you will need without knowing your axle and I don't know what bike you have, but you can Google that. Hope that helps :)