MOS Reference: Handheld pulse spot welder for connecting nickel strips to lithium-ion cells during battery pack assembly. Delivers precise high-current pulses that fuse nickel tabs to cell terminals without heating the cell body. Adjustable pulse duration and current settings accommodate different strip thicknesses and cell chemistries. Essential tool for building custom 18650 and 21700 battery packs for e-bikes, power walls, and portable power stations.