As we are making sure our customers are getting the same high-grade cells that are sought after by large producers of electric bikes, our cell manufacturer is using the same philosophy one step higher up the production chain. Japan is world famous for its leading role in the lithium battery industry, and has experts and companies that specialize in the highest quality niches of all levels of production. Since finished lithium batteries can be only as good as the quality of the raw chemical materials they're built from, it's imperative that the Japanese world leaders in lithium battery production also produce the world's purest lithium battery chemical compounds to insure a steady supply. Though often more expensive than the lower-grade lithium chemical compounds that can be sourced from China and other areas, our cell manufacturer sources its raw materials from Japanese suppliers, the best in the world. This pays off in overall higher quality control, cell stability, and safety in the end products.

Whether you're a die-hard lithium battery researcher and hobbyist, or a newcomer to the world of electric bike kits just getting an overview of the basic considerations, you should be interested in the electrical circuit inside the battery itself called the Battery Management System, or BMS. The BMS is a green printed circuit board (PCB) that looks like a small chunk of the inside of a computer (about 2" x 4") and is actually permanently built inside the battery. You'll never have to interact with this little computer board inside your battery, but it's important you know about its basic functions. The general purpose of the BMS inside each Ukko lithium battery is to make sure the your battery displays a charge level indication, monitor each individual cell and make sure it never gets charged up to high, drained down too low, or discharges its energy too quickly. A BMS on a given battery may have all these functions, one or two, or even additional features. Since all lithium batteries are more unstable that other standard battery types, any big lithium battery should have a BMS as opposed to just relying on the electrical charges in the chemicals of the cells to regulate themselves. Without a BMS, it's possible that the battery will have poorer overall performance and an overall shorter life span than if it's cells were individually looked after by a computerized BMS. Also, without a BMS it's possible for one or two cells to become overcharged compared to the others, heat up, and catch on fire, destroying the whole battery. Make sure any lithium battery that you buy that's big enough to run an electric bike comes with a BMS.