US Patent 10229552 Methods and systems for delivering electric energy

A dispenser for dispensing charged battery units into a tank of an electrically powered apparatus. The dispenser comprises a dispensing container for accommodating a plurality of charged battery units, and a conduit having a first end coupled to the dispensing container and a second end adapted to be coupled to a tank to be filled. The dispenser further comprises a dispensing mechanism for selectively dispensing battery units to the tank through said conduit, the dispensing mechanism comprising a metering unit for monitoring and controlling the number and or state of battery units dispensed.