Product Weight: 295g, Model: 105x, Input of Base: 5V/2A max, Total Power: 5000mAh/3.7V/18.5W, Brand: Coble(Xiaomi Ecological Chain), Power Bank Input/Output: 5V/3A max, Color: White / Red, USB Input/Output Port: Type C, Dimensions: 159mm*86mm*19.2mm.
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($33.99): 13f142
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG3CSUM, bgssaff9, aff7off, BGaDmITAd, 0e7f33, FBCOUPON1, BGMPB2020, bGhOnEy10, BGXMI15, BGdragonBoat, BGSS10%SW, BGAFF10OFF, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BG15POWERBANK, BGCuponation10
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for Xiaomi 3Life 3A 5000mAh Type-C Wireless Charger is here. The lowest price was: $21.99.
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)).