5.1V-2.6A (Dual Ports), Battery Type: lithium ion polymer battery, Size: 150.5 X 73.6 X 15.1mm, Model: PB100LZM, Input: 5V-2.1A, Capacity: 37Wh 3.7V 10000mAh, Output: 5.1V-2.4A (Single Port), 1x USB-C, Package size: Approx. 18×9.5×3.5cm / 7.09x 3.74x 1.38 inches, Output Ports: 2x USB-A (USB cable not included), Input Ports: 1x Micro USB, Package weight: Approx. 350g /12.35os.
Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
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.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($31.50): BG85d5c6
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGredmip1, aff7off, BGaDmITAd, BGrm1w, BGREDMIPOWER, 0e7f33, FBCOUPON1, BGRMPBa, BGXMI15, BG9Redmi100, BGRedmi10000Bank, BGRedmi10000CNCZ, BG15POWERBANK, BG12Redmi10CN, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BG38f626, BANGGOODSD, 6GSGIT, BGCCARG
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Redmi 10000mAh PB100LZM Power Bank [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Redmi 10000mAh PB100LZM Power Bank? There we go. The lowest price was: $14.99.
Price records source(s): Gearbest, 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)).