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Compact portable spot welder with OLED screen and detachable welding pen

BFKK

BFKK 3000F Portable Spot Welder 120 Levels 18650

SKU CH-S5X4-M4XYZ

Portable 3000F capacitor spot welder with 120 adjustable levels for 18650 cells and .1-.3mm nickel strip

  • Clear OLED screen shows real-time capacitor and voltage data
  • MCU precision control delivers accurate current output with auto mode and overheat alerts
  • 120 adjustable power levels match nickel strip thickness from 0.1-0.3 mm
  • Detachable welding pen with 4 interchangeable needles for long-term use
  • Simple press-and-hold operation with memory recall and 5-minute auto-shutdown

Portable 3000F Spot Welder

The BFKK 3000F is a portable spot welder built around a 3000F farad capacitor for 18650 battery work. It targets hobbyists and technicians who need adjustable energy storage for nickel strip assembly. The unit delivers 120 levels of power output to match strip thickness and material. An OLED screen shows capacitor values and voltage in real time.

MCU Thermal Management

An intelligent MCU monitors temperature and regulates current through high-quality MOS components. Overheat alerts trigger automatically to protect the capacitor and circuitry during extended sessions. A five-minute auto-shutdown conserves energy when the welder is left idle. The system balances output precision with component longevity.

Detachable Pen & Nickel Range

A versatile welding pen accepts four interchangeable needles for quick replacement and sustained weld quality. The machine supports nickel strips from 0.1 to 0.3 mm without additional tooling. Simple controls use a long press for power and single taps to navigate settings. Auto mode and memory recall streamline repetitive production tasks.

How it compares

Measured against everything we stock in Welding Equipment & Positioners, at today’s prices. Recalculated every night.

Price $146.99
Pricier than about 72% of the 1,978 comparable items (median $50.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the welding needles and what step is often missed?

Select one of the four interchangeable needles, insert it into the detachable welding pen, and secure the locking collar; the step users miss is confirming the needle sits flush before the first weld.

What maintenance or replacement will this welder need later?

The four supplied welding needles are consumables; replace them when the tips wear or carbon builds up, and keep the pen contacts clean for consistent current delivery.

What limit appears first during sustained spot welding?

The built-in temperature monitoring triggers an overheat alert and auto-shutdown after five minutes of continuous operation to protect the 3000F capacitor and MOS circuitry.

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