$45.99 – Material: ABS + PCB, Theoretical standby: More than 2.5 years, Battery working cycle life: 1000 cycles, Battery capacity: 5000mAh, Size: About 112x80x30mm/4.41×3.15×1.18in, Full charging time: 2 hours, Overcurrent protection: 1.12KA, Voltage: 4.2±0.05V, Welding current: 6-800A, Standby current: 20uA, Battery life: 800-2000 times.
Latest update shows that Spot Welder Machine 0.1-0.15mm Nickel Welding Machine costs $45.99 (in Banggood). Price history, coupons and price alert are available on this page. What is best price?
Latest price update (UTC time):
Banggood ($45.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. What about the price? It looks like it’s a good price (lower than average ($48.10)).
Link: Banggood product page
Price: $45.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGd2f208, BGET12, BGET10, BGCAPITALOS8, BGCOUPERT8, BG8FORMULAMX, BG124578, BGPowerTLS2, BGPowerTLS1
(you can check these old coupons out, but these probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Spot Welder Machine 0.1-0.15mm Nickel Welding Machine? There we go. The lowest price was: $44.99.
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)).