Package weight: 407g, Package size: 143x107x48mm, Welding Output: 4.2V MAX 650A, USB Output: 5V MAX 2.4A, Product Size: 103x83x29mm, Product Weight: 302g, Charging Port: Type-c, Battery Capacity: 5500mAh, Material: Metal Case.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
DH20 Pro+ Adjustable 9 Gears DIY Mini Spot Welding Machine With Quick Release Pen Nickel Plate 18650 Battery Welder Spot Welder | $94.16 | – |
Click here to search by yourself. Here are coupons that you can use.
Updated:
Banggood
Warehouse in China.
Link: DH20 Pro 9 Gears Mini Spot Welder
$45.55 with coupon: BG6f35ca
$53.54 with coupon: CityadsTool
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
Price history (for all/most countries) for DH20 Pro 9 Gears Mini Spot Welder is here. The lowest price was: $42.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).