Mini Spot Welder Machine 12V Lightweight Battery Energy Storage Type Spot Welding Tool Battery Diy Circuit Board Spot Welder            Description      Welding is a technique that requires practice. The scientific principle of spot welding is resistance welding. Too tight or too loose pressure will cause the solder joints to be weak. A successful welding will not produce a large amount of sparks and visible light sinks in the solder joints. The best technique is to lightly press the soldering pen to feel the collapse of the solder joint at the moment of current output.    Features   Mini spot welder machine   -Color: As shown.   -Material: ABS.   -Size: 10.7x5.3 cm/4.21x2.09 inch.   Specification:   Working voltage: 6.5V-16v   Working current: <20ma   Standby power consumption: <0.5ma   Recommended temperature: -10-60°   Weight: <100g   Welding peak current: 180A MAX   Intelligent sleep: 8 minutes of automatic sleep   Welding mode; default automatic welding mode   Welding nickel sheet thickness: 0.1-0.3mm (related to battery discharge energy   Commonly used power supply: high-rate lithium battery, lead-acid battery, high-rate lithium iron phosphate and other lithium batteries   Operation instructions   1. Connect the positive and negative poles of the battery according to the product connection diagram.   2. The soldering pen and battery cable should be locked with fixing screws to avoid sparking and welding   Not reliable, not strong.   3. Long press the on/off button for 2 seconds to turn on the device, at this time the turn-on indicator will always be on (blue light);   4. Select the corresponding capacity (green light), magnification (blue light) and indication according to your own battery parameters   The lights will be lit accordingly;   5. Short press the gear selection (yellow light) button again to select a suitable gear for welding;   6. Locate the nickel sheet and place the nickel sheet on the positive/negative electrode of the battery to be welded. The two soldering pen tips are as close as possible, and lightly touch the nickel sheet. After 0.5 seconds, the instantaneous pulse welding nickel sheet will be automatically output; after each output The buzzer sounds once, and then the spot welding pen needs to be removed, otherwise the second output cannot be performed (the purpose is to prevent the welding time from being too long and damaging the battery).   Note: Small capacity 18650 battery and DC power supply cannot be used as power supply. It must have a high-rate lithium battery pack or car start-up lead-acid battery discharge capacity> 100A   Description of buttons and indicators   1. Turn on and off the button; long press the power button for 2S, the device can be turned on, off, and on at the same time   The indicator light will also light up or go out accordingly;   2. Capacity, rate, users can select the corresponding parameters according to their own battery parameters, and at the same time   The response indicator will light up accordingly, the capacity indicator will be green, and the rate indicator will be blue;   3.