Abstract: The present invention is an improved lithium-ion battery core system for use within an electric vehicle. The present invention has a battery receiver and a battery charger. The battery receiver has a battery adaptor and a receiver lock. The battery adaptor allows the present invention to insert standardized lithium-ion cores that are managed at a specified voltage level suitable for the electric vehicle. The lithium-ion core includes a removable and rechargeable lithium-ion core, that can be charged by the battery charger. The battery charger has a plurality of cores, a plurality of lights, and an ejection button. The ejection button removes a battery from the battery charger. All of these various components allow for the present invention to provide users with a system for keeping electric vehicles properly charged for long distance travel.