Handheld Spot Welder Machine for Use in Precision Welding of Batteries USE: Precise welding of mobile phone and laptop batteries. PROVIDES: Stable welding current to create even spots and eliminate blackening. FEATURES: Single chip microcomputer displayed on LED screen controls dual pulse welding. INCLUDES: Welder, 6pcs 25A fuse, 20pcs nickel sheet (0.1 * 3 * 100 mm), 2 butts of welding needle input wattage is 1000 watts, and the output Amps is 10 Amps.