DIY Spot Welder 9 Gears 18650 [EU] (Banggood, Aliexpress: Product Weight: 302g, Battery Capacity: 5500mAh, Package weight: 407g, Welding Output: 4.2V MAX 650A, Material: Metal Case, Charging Port: Type-c, Name: Spot Welding Machine, Product Size: 103x 83x 29mm, Package size: 143x 107x 48mm, USB Output: 5V MAX 2.4A (the best price with coupon)).
Check coupons or create price alert down below. Let’s see what best price is ATM.
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.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. There’s only 1 record in my database, so I have no idea if the price is OK.
Link: Banggood product page
1. ($39.99): BG3fd745
2. ($41.64): CityadsTool
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG464337, BGWELDTOOL, BGb4e399, BGANI022, BG8a7644, BG4090b7, BG8dc2f7, BGGines, BGPTL088, BG6d2f05
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – DIY Spot Welder 9 Gears 18650 ($-3)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $39.99.
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)).