Build and repair battery packs anywhere with a cordless spot welder
A Seesii handheld mini spot welder that fuses thin nickel strips onto battery cells to build and repair packs.
It welds 0.1-0.2mm nickel sheet onto 18650 and other cylindrical lithium cells (18650, 26650, 32650), as well as nickel-metal hydride and nickel-cadmium cells, and can also tack iron and stainless steel sheet.
It is fully cordless, running on a built-in 5000mAh rechargeable battery that charges over Type-C and delivers up to around 800 welds per charge, so there is no bench power supply to set up.
An OLED display shows the setting across 80 adjustable power levels, and both automatic and manual welding modes plus a quick-release welding pen make clean, repeatable welds easy for hobby and repair work.
Why Choose This Product
- Cordless and rechargeable: a built-in 5000mAh battery (Type-C charging) gives up to 800 welds per charge, with no bench supply needed.
- 80 power levels: fine control over weld strength for different cells and nickel thicknesses.
- Auto and manual modes: auto fires on contact for speed, manual triggers for precise placement.
- OLED display: clear readout of the selected gear and mode.
- Quick-release pen: an easy-swap welding pen for comfortable, repeatable welds.
How Can You Use This
- Build battery packs: spot-weld 18650 and lithium cells into custom packs for projects and devices.
- Repair and rebuild: replace tired cells in power tool, e-bike and device battery packs.
- Prototyping and DIY: assemble test packs for electronics and maker projects.
- Field and event repairs: a portable welder for on-site battery fixes without mains power.
- Small fabrication: tack thin nickel, iron or stainless sheet for light jobs.
What's Included
- 1× Seesii Handheld Spot Welder
- 1× Quick-Release Welding Pen
- 1× Type-C Charging Cable
- 1× Nickel Strip (sample)
