Abstract: A battery supply system comprising a display tray, an outer box and at least one inner box. The display tray includes a receiving area and a plurality of slots on sides of the receiving area. The outer box has a receptacle area and a pair of side flanges extending outwardly from the receptacle area. The at least one inner box is in the receptacle area of the outer box. The at least one inner box has at least one battery therein. The outer box is positioned in the tray by inserting the side flanges of the outer box in a pair of the slots, thereby maintaining the outer box in an upright displayed position within the tray.