ITEM NAME:Lithium Battery Energy Storage Spot Welding Board DIY Welder PCB Circuit Mod Hn Specification: - Can be welding 18650/26650/32650 lipo battery, it is portable, stable and reliable - System voltage: 12V-14.6V - Working current: 90-150A Suggested battery: - 20-45ah Lead-acid battery with good performance and small internal resistance - 3.5-5.5ah 45C 3S aeromodel lithium battery pack - 30-35ah capacity 18650 battery pack -This circuit with a 12V battery will become an energy storage spot welding machine for welding nickel pieces such as lithium batteries and nickel-chromium batteries. According to different configurations, the thickness can be about 0.1MM-0.15mm Package include: 1pcs x Main Circuit Board 1pcs x Buzzer 2pcs x Input Wire 2pcs x Output Line with Welder Pen NOTE: If the battery is pretty good and the internal resistance is very low, and then there may be large current overload. If you are not sure about your battery, it's better to extend the wire by around 1 meter with 2.5Â ² or 4Â ² wire, then it will reduce the risk of power tube burnt. - The package include should be spare parts, which need welding and assembly by yourself - And it also need you to have some welding technology and circuit knowledge. - PLS mounting the electric capacity to avoid the board burn and other issue.2pcs x Output Line with Welder Pen. - PLS mounting the electric capacity to avoid the board burn and other issue. 1pcs x Main Circuit Board. - 20-45ah Lead-acid battery with good performance and small internal resistance.