I have checked all old coupons and price is 59.99 USD for 22.5W 74Wh 20000mAh Power (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood (59.99 USD)
Banggood warehouse is located in China. Coupons for Xiaomi 22.5W 74Wh 20000mAh Power Bank? Nope, there’re no coupons in Banggood. Is it good price? From what I can see this price is higher than average price (54.12 USD).
Link: Banggood product page
Price: 59.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG589b2e, BGCOUPERT8, BGCAPITALOS8
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Click here… to search for Xiaomi 22.5W 74Wh 20000mAh Power Bank on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi 22.5W 74Wh 20000mAh Power Bank? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).