... batteries. It has the advantage of compact structure, rational layout, small size, light weight, easy to carry, etc. The instrument ... , pressure vessel, pressure and various types of welding structure in electric power, petroleum, chemical industry, machinery industry, etc. Because of ... volume: 60 * 88 * 155 mm.l Working current: 1 A +/- 0.2 A.l Battery continuous working time: 4 hours.3.Main structure ...