Item Type: Portable Spot Welder Product Material: Aluminum Alloy Product Size: Approx. 11 x 8 x 3cm / 4.3 x 3.1 x 1.2in Built in Battery Model: 18650 Capacity: 5000mah Features: Weldable Nickel Plated Tape: Maximum weldable 0.2mm nickel plated tape, 0.25mm slotted nickel tape to assemble 18650 and other battery packs, recommended for long term use of 0.15mm Long Standby Time: The standby time can be up to 1 year when it is turned off, and the storage time can be up to 3 years. GEAR: gear adjustment, short press the white button to switch the mode, the arrowhead points to xxms, long press the black button to adjust the gear, divided into 30 gears DELAY: Delay adjustment, the adjustment method is the same as the gear BAT: battery power display, real time monitoring of battery voltage, low battery sound and power warning, automatic shutdown TEST: The actual output of the current value measured by the welding pen Short Circuit Protection: The machine is equipped with short circuit protection to monitor each weld x: Indicates short circuit protection Use scenario 1: power bank, toy car maintenance, because the power bank, toy car current is relatively small, generally between 1-3A, you can use 0.1 nickel tape spot welding. Adjust the parameters (GEAR=5ms DELAY=0.8S) to easily weld, the solder joints are very bright, not black, not oxidized, greatly increasing the service life Use Scenario 2: Pointed batteries are generally easier to obtain, but due to a concave position, ordinary spot welders can only be adjusted in five or six gears. If the pressure is too tight, it cannot be welded, and if it is too light, it will burn through. Use this welding machine to adjust the parameters (GEAR=7ms DELAY=0.8S) to properly increase the current output. Nickel strips are spot welded firmly in the grooves. Perfectly achieve maintenance goals. Use scenario 3: Power lithium battery, which can provide huge current. Power tools, electric vehicles all use it to assemble industrial 0.15mm or even 0.2mmn nickel strips. Just adjust the parameters (GEAR=30MS DELAY=1.2S)