Latest update shows that X5 Mini Turbo Fan 3000mAh costs $52.99 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
X5 Mini Turbo Fan High Capacity 3000mAh Battery Quick Charging Lightweight Travel-friendly Perfect for Outdoor Adventures or Office Use – Black
Latest price update (UTC time):
Banggood ($52.99)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. Low/high price? From what I can see this price is higher than average price ($45.32).
Link: Banggood product page
Price: $52.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGcd62ad
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for X5 Mini Turbo Fan 3000mAh.
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)).