NOVELTY - A vehicle comprises electrical motor(s)/generator(s); and a battery system comprising multiple, greater than or equal to 5 preferably 10, battery packs electrically connected in series with each pack comprising greater than or equal to 5 preferably 10 cells also electrically connected in series, water-tight multiple battery pack housing to house the cells in each of the battery packs and facilitate electrical connection to other battery pack(s), and a compartment containing the multiple battery packs in their housing to facilitate electrical connection to the motor/generator.    USE - Vehicle.    ADVANTAGE - The vehicle is capable of being driven by electric power using a high power output battery, particularly lithium ion battery system that is long lasting, reliable and safe.    DETAILED DESCRIPTION - A vehicle comprises electrical motor(s)/generator(s); and a battery system for supplying electrical power to and receiving electrical power from the motor/generator, comprising multiple, greater than or equal to 5 preferably 10, battery packs electrically connected in series with each pack comprising greater than or equal to 5 preferably 10 cells also electrically connected in series, water-tight multiple battery pack housing to house the cells in each of the battery packs and facilitate electrical connection to other battery pack(s), and a compartment containing the multiple battery packs in their housing to facilitate electrical connection to the motor/generator. The battery pack housing includes pair(s) of openings to allow a thermal fluid, particularly air, to circulate in between. Every cell has a rectangular prism shape, and a length that is greater than its height, and the height is greater than its thickness. An INDEPENDENT CLAIM is included for a battery system for providing power to an electric motor of a vehicle.    DESCRIPTION OF DRAWING(S) - The drawing is a perspective view of a flattened core used in a battery cell where the sheets forming the core are not coiled.    Active anode layers (106)    Anode substrate (107)    Active cathode layers (112)    Cathode substrate (114)    Separator sheet (115)    Core (200)