AWithZ UF20B Professional Super Capacitor Spot Welder – 10.5KW Power, 99 Gears, 3 Modes (Auto/Manual/Foot Pedal). 1 × AWithZ UF20B Spot Welder Main Unit. Model UF20B. Battery Types: 18650, 14500, 21700, 26650, 32650, LiFePO4, industrial batteries, laptop batteries, power tool batteries, EV batteries.