Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now…
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGzuzu519, BG10OFFAFF, BGwhielabel, 13f142, BG96af7c, BG10OFFAFF1, BGBCNISP9S, BG1cf863, BG6f26bc, 6GSGIT
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for P9S Mini Foldable Stretchable Fan 7200mAh is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).