Aliexpress
Click here… to search for MI Backpack USB Charging on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
Coupon (46.52 USD): BG589b2e
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 2019SPEDM, BG3CSUM, AFfbG10, BGBAPK, BGCITYADS2019, BGUSBP, 0e7f33, FBCOUPON1, BGdragonBoat, bGhOnEy10, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, 13f142, BANGGOODSD, 00c906, BGef96eb, Kortings10, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BGGutscheine, BG00c906, ADMITADBLACK, BG8OFFCOUPON, TTBLACK5
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for MI Backpack USB Charging? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).