We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Seesii SE-223 spot welder, silver aluminium case, 1.8 inch LCD screen, dual welding probes

Seesii

Seesii SE-223 3000F Capacitor Spot Welder

SKU CH-4K9Z-24QFJ

AC-powered capacitor spot welder delivers 1400A from 3000F supercapacitors for 0.1-0.3mm nickel strips with 250 adjustable levels on a 1.8-inch LCD

  • Welds 0.1-0.3mm nickel strips with 1400A peak current from 3000F supercapacitors
  • 250 adjustable power levels in 0.1 increments via 1.8-inch LCD for precise control
  • Automatic trigger and manual foot pedal modes suit different assembly workflows
  • Aviation-grade aluminium construction dissipates heat and resists impact for portable use
  • Built-in power balancing and intelligent fan cooling protect capacitors and extend service life

Battery Pack Spot Welder

The Seesii SE-223 is a capacitor spot welder built for assembling and repairing battery packs. It uses a 3000F supercapacitor bank to deliver up to 1400A of welding current. The unit handles nickel strip thicknesses from 0.1mm to 0.3mm. It is intended for hobbyists, technicians and small workshops working on lithium battery modules.

Precision Control Limits

Welding energy is set across 250 adjustable steps in 0.1 increments and shown on a 1.8-inch LCD screen. The standard is limited to thin nickel strip within the stated range; thicker busbars or heavier gauge materials fall outside its capability. Automatic trigger and manual foot-pedal modes give two ways to initiate a weld, but the machine remains a single-pulse spot welder without seam or stitch functions.

Upgrade From Basic Tools

This welder replaces handheld soldering irons, low-capacity capacitor pens and fixed-power bench units that lack fine adjustment. The jump is worth it when you need repeatable welds on 0.1-0.3mm nickel without overheating cells. It does not suit production lines needing multi-pulse sequencing, high-duty-cycle automation or welding beyond the specified strip thickness.

Highlights

  • Welds 0.1-0.3mm nickel strips with 1400A peak current from 3000F supercapacitors
  • 250 adjustable power levels in 0.1 increments via 1.8-inch LCD for precise control
  • Automatic trigger and manual foot pedal modes suit different assembly workflows
  • Aviation-grade aluminium construction dissipates heat and resists impact for portable use
  • Built-in power balancing and intelligent fan cooling protect capacitors and extend service life

Specifications

No published specifications for this item yet.

Questions about this item

Which power level should I select when welding 0.1 mm versus 0.3 mm nickel strip?

Start near the lower end of the 250-step range for 0.1 mm material and move higher for 0.3 mm; the 0.1 increment LCD lets you dial in the exact energy each thickness needs.

What does the 1400 A peak current mean when I am actually building a battery pack?

It delivers the high-energy pulse needed to fuse 0.1-0.3 mm nickel strips to cells quickly, giving strong, repeatable welds without overheating the surrounding area.

How does the AC-powered supercapacitor design limit the maximum welding current in practice?

The 3000 F capacitors store energy from mains power and release it as a controlled 1400 A pulse; the built-in balancing circuit and fan keep output stable across repeated welds.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.