Battery Info Chemistry 2

One of the newer types is the Lithium nickel-cobalt-manganese  or Lithium NCM battery. This type of chemistry has a high energy density like the LiCoO2, but the nickel and manganese elements in the cells make them more stable and therefore safer and easier to produce. Lithium NCM batteries must still be monitored by a battery management system (BMS) during operation to protect the cells from over charging, over discharging, short circuit situations, and over current situations, but can safely be built into bigger sizes with internal BMS circuit boards. These Lithium Nickel-Cobalt-Manganese batteries are safe, stable, and powerful, and are used in electric wheel chairs, bikes, and the  Hill Topper electric bike conversion kit

Different types and sizes of lithium battery will have more or less ability to store a certain amount of power, and it's important to understand some basic terms used to describe this issue. A battery is basically like a gas tank for an electric motor. In terms of shopping for a battery, to power your electric bike hub motor you'll be considering things like overall price, weight, and how much power your "gas tank" can hold, so it's good to have a basic vocabulary to accurately compare different batteries. "Amps" describe how big a flow of electricity a battery can put out, for example. So one good way to compare batteries is by asking, "if these two batteries were putting out the same size flow of electricity, which one would run out first?" It's like comparing two bath tubs that are draining. You could ask, "if these two bath tubs had exactly the same size of drain hole, which tub would empty out first? The basic answer in this case is simply, "the tub with the least amount of water stored up in it to begin with will be empty first." If the drain hole on each tub could let water through it at a rate of, say, 8 gallons per hour, and one tub starts with 8 gallons and the other starts with 12 gallons, the first tub will drain in 1.0 hours while the other will drain in 1.5 hours. If these tubs were batteries we would expect the "1.5 hour" battery to be a little more expensive, and maybe a little bit bigger or heavier as it could do work for a longer time. If you shopped around and compared prices and specifications and found one of these "1.5 hour" batteries with the same price or maybe a higher price but the same or even smaller size or weight as the "1.0 hour" battery, you could then easily tell if it was a good deal.