$18.99 – KUULAA Mini Power Bank 4500mAh (Banggood, Aliexpress: KUULAA KL-YD47 Mini 4500mAh Built-in Type-C Plug Emergency Power Bank External Battery Power Supply Fast Charging for iPhone 12 13 14 14Pro 14 Pro Max – Black+Type-C (the best price with coupon)).
I have just checked coupons. The lowest price I could get is $18.99 for KUULAA Mini Power Bank 4500mAh (in Banggood). Price history, coupons and price alert are available on this page. Best price?
Latest price update (UTC time):
Banggood ($18.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? Is it cheap? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $13.20)
Link: Banggood product page
Price: $18.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG589b2e
(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
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 KUULAA Mini Power Bank 4500mAh? There we go. The lowest price was: $11.61.
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)).