In testing we were able to run the welder for just over two minutes on each full charge. This resulted in a 6-foot weld bead between two pieces of 1/8-inch plate. When welding 1/4-inch plate we were able to make either 14 stitch welds 3 inches long each, 21 inches of woven welds, or 35 inches of straight stringer welds on a full charge each. With a 20-minute recharge to 80-perecent capacity, we could lay 26-30 inches of straight weld bead on 1/4-inch plate for two minute before the charge ran out. This seems like plenty for one or two major repairs on a trail-dead 4x4.