SUNKKO 788S spot welder New upgrade 2.8KW spot welding machine spot welding battery USB power charging test 18650 battery as one Specification: 100% new high quality Type: Battery spot welder Model: SUNKKO 788S Input voltage: 110v / 220v Power: 2.8KW weight:5.5kg size:37*21*30cm Maximum welding thickness: 0.25mm Application: 18650 battery pack welding Features: Pulse precision spot welder Battery welding/charging/ testing / 3 in 1 FAQ： 1: How many volts is the 788S used? The 788S is used at 110V or 220v. 2: What is the welding thickness of the 788S spot welder? The welding thickness of the 788S spot welder is 0.05-0.25mm 3: What is the function of the 788S spot welder? 788S spot welder function a. Can spot weld lithium battery b. can test lithium battery pack c. can charge USB power