$29.99 – Xiaomi 20W 19.4Wh 5000mAh Slim Power Bank PB0520MI (Banggood, Aliexpress: Xiaomi 20W 19.4Wh 5000mAh Slim Power Bank External Battery Power Supply with USB Type-C Fast Charging for iPhone 15 15 Plus for Huawei Pura 70 Ultra for Xiaomi Civi 4 pro for Samsung Galaxy S24 (the best price with coupon)).
You can get Xiaomi 20W 19.4Wh 5000mAh Slim Power Bank PB0520MI for $29.99 using coupon code (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Latest coupon code price check (UTC time):
Banggood ($29.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Well, is it a good price anyway? Good news! This is great price, coz it’s the lowest in CouponsFromChina database!
Link: Banggood product page
Price: $29.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
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
Price history (for all/most countries) for Xiaomi 20W 19.4Wh 5000mAh Slim Power Bank PB0520MI is here. The lowest price was: $29.99.
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)).