110V SUNKKO 709A Pulse Spot Welder Battery Welder for 18650 Battery Welding Soldering Machine

94% of buyers enjoyed this product! 32 orders
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Product Details
Item Specifics
Shipping & Payment
Product Details

For Brazil customers, in order to make the customs clearance smoothly and receive your product asps, when placing an order, please leave your CPF or CNPJ number. Thank you for your cooperation.

For Russia customers, in order to receive your product sucessfully and asps, when placing your order, please make sure the recipients name is your full name.

Please make sure there is a SRSP pick up service in your city and pay attention to the tracking information. And this shipping service needs you to pick up the package at the local SPSR office.

Thank you for your cooperation.

Tariff: The price here does not include the tariff, so customers need to pay the tariff.

Attention:  If buy 2 pcs or more products in one order ,please do NOT pay before we change the price for you cause the Aliexpress system may miscalculate the shipping cost, thanks. 


One Year Warranty

(The item will be shipped to you according to your local voltage and plug standard.)



2, 4, 6, 8 pulse selection.

Three welding options:
Fixed welding head: apply to a small number of batteries welding.
Fixed welding head with footswitch: coordinate your hands and feet to improve efficiency.
Movable spot welding pen with footswitch: expand your working area, used to weld battery pack.

Soldering function:
Used for circuit board etc.
Connecting BMS to battery pack. (BMS means battery management system, every lithium battery pack needs it.)



Spot-welder part
Supply Voltage  AC 110 V / 60 Hz; AC 220V / 50Hz (If you need 220V, please click here)
Power 1.9 KW (Instantaneous)    
Current 500 A   
Electric leakage Switch Requirement 60 A or more than 60 A  
Time of Double Pulse 1 ~ 10 ms 
(Instantaneous Welding Time) (adjustable, by adjusting the welding current knob)
Time of Four Pulses 2 ~ 20 ms (adjustable)
(Instantaneous Welding Time)
Time of Eight Pulses 8 ~ 80 ms (adjustable)
(Instantaneous Welding Time)
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 Head

For 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

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. The requirement for electric leakage switch is more than 60 A, it is not recommended to use at home.







How to set the welding parameter? Just for Reference


We also sell many kinds of nickel strips and other accessories  for spot welder, you may need it:





1. We accept Alipay (Escrow Service), Credit Card, Brazil Boleto and other methods of payment.

2. If you encounter payment problem, send us a message and we will be happy to help. Please confirm your shipping address when paying. 



Shipment & Return Policy


We can ship our item by Fedex, TNT, DHL, EMS, etc. according to the weight and shipping method you select.

Return Policy

return-policy -aliexpress

(1) You can contact us by message, trademanager or skype(+1)5109843568.

(2)Please keep in mind that we can only accept return for items that in same condition as when you received. And we are only responsible for the shipping cost when item is damaged or not as described.

Contact us & Feedbacks

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Item Specifics
Brand Name:
Battery Spot Welder Welding Machine
Rated Duty Cycle:
Max. Welding Thickness:
0.3 mm
7 kg
Model Number:
36 x 18 x 44 cm
Rated Capacity:
Supply Voltage:
AC 110 V
1.9 KW 500 A
Electric leakage Switch Requirement:
60 A or more than 60 A
Time of Double Pulse:
1 - 10 ms
Time of Four Pulse:
2 - 20 ms
Time of Eight Pulses:
8 - 80 ms
Suitable Welding Thickness:
0.03 - 0.3 for Fixed Copper Head
Suitable Welding Thickness 2:
0.03 - 0.2 mm for Mobile Welding Pen
Shipping & Payment


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-20 Business days
Canada, Europe 10-20 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.

If you received the wrong item you can request a refund or a reshipment.

If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of SAJAKS Favorites (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of www.sajaksfavorites.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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