Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Supports 3pcs 18650 batteries (not included), Wattage range: 1 – 300W, Diameter: 25mm, Charging time: 2 hours, Resistance range: 0.05 – 1.5 ohm (TC Modes), 0.1 – 3.5 ohm (VW mode)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $28.99.
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)).