A
Anonymous
Apr 05, 2026
Rating: 5/5
Safe supercap design
I like the supercapacitor approach instead of direct battery welding.
Description
KEKK K100 Compact Handheld 12V Supercapacitor Spot Welder Control Board Module for 18650 Lithium Batteries
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Input Voltage | 12V DC |
| Energy Storage | Supercapacitor |
| Welding Material | 0.1mm-0.2mm Nickel Strip |
| Battery Compatibility | 18650 Li-ion Cells |
| Assembly Required | Yes (DIY Kit) |
| PCB Material | FR-4 Fiberglass |
| Control Method | Manual Pulse Button |
| Enclosure | ABS Plastic Case |
| Cable Length | 1.5 Meters |
| Weight | 250 Grams |
5 reviews
A
Anonymous
Apr 02, 2026
Rating: 3/5
Hard for beginners
Requires good soldering skills to assemble the board itself.
A
Anonymous
Mar 25, 2026
Rating: 5/5
Perfect for battery packs
Worked great for my e-bike battery project. Welds are strong and consistent.
A
Anonymous
Mar 03, 2026
Rating: 5/5
Consistent pulses
Very reliable for nickel strip welding on 18650 cells.
A
Anonymous
Feb 02, 2026
Rating: 4/5
Good value kit
Components are quality. Instructions could be more detailed for beginners.
5 FAQ
Q: Is soldering required?
A: Yes, you need to solder the components onto the PCB during assembly.
Q: Can it weld steel strips?
A: It is optimized for nickel strips. Steel may require higher power.
Q: What power adapter do I need?
A: You need a standard 12V DC power adapter with at least 2A current.
Q: Is it safe for lithium batteries?
A: The supercapacitor design minimizes heat transfer to the cells.
Q: Does this kit include all components?
A: Yes, all electronic components and the case are included.
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