4.2V Handheld Spot Welder Automatic Welding Tools Adjustable for 18650 21700 32650 Lithium Battery Support 0.1-0.15mm Nickel Sheet

Features:
The welding machine itself has overcurrent protection, low voltage protection, overvoltage protection, and overtemperature protection.
Lithium battery protection: charging to 4.2V can prevent battery expansion.
When in the off state, thanks to the low power consumption feature, it can be standby for up to one year.
Two ultra-high rate model airplane lithium batteries, the discharge peak value can reach 630A+, all high-current circuit layouts, use infrared thermal Imaging to optimize the design, and better share the discharge current.
Short-circuit protection of the soldering pen.