NOVELTY - Refueling device (116) comprises fuel and waste handling units (118, 120), a communication port, and a refueling device controller (122). The fuel handling unit includes a fuel port, and a fuel conveyance unit to convey fuel from refueling device to fuel cell (110) system (102). The waste handling unit includes waste port, and waste conveyance unit to convey waste from fuel cell system to refueling device. The refueling device controller establishes a communication link with fuel cell system via communication port, such that fuel cell system directs operation of fuel and waste handling units.    USE - Refueling device for servicing a fuel cell system used to power devices, e.g. forklifts, pallet loaders, automated-guided vehicles, or other material handling equipment.    ADVANTAGE - The refueling device can control the refueling and waste removal operations in an automated manner and in compliance with environmental and safety regulations.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a fuel cell system comprising a fuel input port, a fuel storage unit, a communication port, two sensors, and a fuel cell system controller; and    (2) a method for servicing a fuel cell system using a refueling device, comprising detecting a connection between the refueling device and the fuel cell system; responsive to detecting the connection, determining a fuel level of a fuel storage unit included in the fuel cell system; responsive to determining that the fuel level is below a threshold fuel level, initiating conveyance of fuel from the refueling device to the fuel storage unit; and responsive to determining that the fuel level is at least the threshold fuel level, terminating conveyance of fuel from the refueling device to the fuel storage unit.    DESCRIPTION OF DRAWING(S) - The drawing shows an overall system having fuel cell system serviced by a refueling device.    Fuel cell system (102)    Fuel cell (110)    Refueling device (116)    Fuel and waste handling units (118, 120)    Refueling device controller (122)