An electric-vehicle battery (EVB) (also known as a traction battery) is a battery used to power the electric motors of a battery electric vehicle (BEV) or hybrid electric vehicle (HEV). These batteries are usually rechargeable (secondary) batteries, and are typically lithium-ion batteries. These batteries are specifically designed for a high ampere-hour (or kilowatt-hour) capacity. Batteries for electric vehicles are characterized by their relatively high power-to-weight ratio, specific energy and energy density; smaller, lighter batteries are desirable because they reduce the weight of the vehicle and therefore improve its performance. Compared to liquid fuels, most current battery technologies have much lower specific energy, and this often impacts the maximum all-electric range of the vehicles. The most common battery type in modern electric vehicles are lithium-ion and lithium polymer, because of their high energy density compared to their weight. Other types of rechargeable batteries used in electric vehicles include lead–acid, nickel-cadmium, nickel–metal hydride, and, less commonly, zinc–air, and sodium nickel chloride batteries. The amount of electricity stored in batteries is measured in ampere hours or in coulombs, with the total energy often measured in kilowatt-hours. Video Credit: www.bmw.com This video is part of our ‘How Everyday Things are Made’ series. To watch other video of the series click on this link:    • How Everyday Things Are Made?   Join 'Engineering World' like many others to get access to very special perks: null Also, kindly consider subscribing to our channel if you liked the video: https://geni.us/SubscribeChannel Watch some of our other interesting manufacturing videos: How Plywood Is Made In Factories? https://www.youtube.com/watch?v=3Wh9NYvfStk How LUXURY Rolls-Royce Cars Are Made ? https://www.youtube.com/watch?v=BVvnSzMqI3M How Jigsaw Puzzles Are Made? https://www.youtube.com/watch?v=nylElsB9MkE