Sunkko 709A Battery Spot Welder 18650 Welding Machine 1.9KW

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was $243.99 Special Price $193.99
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Product Location:United States,China
Product Condition:New
  • 2 in 1 function: battery welding function and soldering function;
  • Applicable welding range: 0.03 - 0.3 mm for Fixed Copper Head; 0.03 - 0.2 mm for Mobile Welding Pen;
  • Welding Current: 500 A; Max. Output power: 1.9 KW.
  • One Year Warranty
  • Shipping: US shipping for US customers who need 110 V;

Anyway, we diy some lithium battery packs for e-bike also, for me, 709A spot welder can absolutely meet all my battery processing demands.

During this process, iron solder is necessary for connecting wires or BMS, its temperature can be increased up to 300℃ (572℉) within several seconds, the solder equipped is really an efficient tool.

Three welding choices: fixed welding head, fixed welding head with footswitch, moveable spot welding pen with footswitch.

Just enjoy your creative process with this battery spot welder.

 One Year Warranty


Spot-welder part
Supply Voltage

 AC 110 V, 60Hz; AC 220V, 50Hz

Power 1.9 KW (Instantaneous)    
Current 500 A   
Electric leakage Switch Requirement ≥ 40A
Time of Double Pulse
(Instantaneous Welding Time)
1 ~ 10 ms 
(adjustable, by adjusting the welding current knob)
Time of Four Pulses
(Instantaneous Welding Time)
2 ~ 20 ms (adjustable)
Time of Eight Pulses
(Instantaneous Welding Time)
8 ~ 80 ms (adjustable)
Welding Pin Range 5 - 6 mm
Welding Pressure 300 - 500 g
Welding Distance Adjustable
Suitable Welding Thickness 0.03 - 0.3 mm for Fixed Copper HeadFor pure nickel strip: 0.03 - 0.15 mm
0.03 - 0.2 mm for Mobile Welding Pen
Soldering iron part
Temperature 150°C ~ 450°C 
Power 50 W
Output Voltage 20 V DC

please refer to the 709 A spot welder manual for more detail


Attention: 1.  This spot welder can be used to weld the nickel, nickel plated steel, nickel plated iron, iron and other alloys, but it can't be used to weld metal including copper and aluminum.

                  2. The welding thickness 0.03 - 0.3 mm indicates the thickness range of all alloy it can be weld, for nickel or nickel plated steel, the range is 0.08 - 0.3 mm.

                  3. If the spot is not reliable, increase the welding current and the quantity of pulses can improve the welding performance.


Name Quantity
Spot Welder 1 unit
Welding Pen 1 pcs
Bent Handle Spanner 1 pcs
20 A Fuse 2 pcs
Aluminum Copper
Welding Needle
4 pcs
T12 Iron 1 pcs
Foot Switch 1 pcs
0.1*4*100 mm Nickel Strip 50 pcs
Battery Clamp 1 pcs
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US Shipping

Processing: 1 - 2 Business Days

En route: 2 - 5 Business Days

(In Ohio warehouse now. Continental US by Fedex ground, other area by USPS and additional charge may apply)

Ship from China for other countries customers.

Processing time: 2-3 Business days

En route: 3-7 Business days (Fedex_IE, DHL, or TNT)