A multi-charging and sterilizing apparatus includes a case having a slot unit on one surface thereof; a plurality of slots defined in the slot unit such that a plurality of objects are inserted into and mounted in the plurality of slots; and ultraviolet sources disposed in the respective slots to irradiate ultraviolet on front surfaces and rear surfaces of the objects. The nitrogen prevents the fuel tank ullage from becoming filled with flammable fuel fumes which can cause an explosion. The pick up device includes a balance section defining a balance surface extending parallel to the supporting surface such that when the pick up device is attached onto the printed circuit board, the balance surface of the pick up device is operable to be rested on the printed circuit board so as to counterbalance force torque caused by introduce of the supporting portion. The application which generates the error message may or may not be updated. The machine is configured for supplying to the cartridge, at a controlled temperature and rate, sterile water for use in haemodialysis and is operable to maintain, in a sterile condition, residual water contained therein after completion of a haemodialysis treatment.