US Patent 9515305 Connector and battery pack including the same

A battery pack having a connector that is designed to work outdoors or in a moist environment. The battery pack includes a case including a first case attached to a second case to enclose an inner space within, a plurality of rechargeable batteries arranged within the inner space and a connector arranged within the inner space of the case, being exposed to an outside of the battery pack to enable a device external to the battery pack to be electrically connected via the connector to the rechargeable batteries, wherein the connector is arranged to form a waterproof barrier between an outside of the battery pack and a remainder of the inner space of the case not occupied by the connector.