Double USB interface, Capacity (mAh): 10000mAh.
Just check coupons out (with price alert and history). 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. I can’t find any active coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, ineedit2, aff7off, a3c099, e2bcea, XiaomiBank, a2fsre, 03d644, BG1mahmi, 2019SPEDM, BG1w1bn, BG3CSUM, BGmi1wnb, bgssaff9, BGaDmITAd, BG10KRA, 0e7f33, BGXMPB1W, FBCOUPON1, BG8XiaomiCNBank, BGAFF10OFF, BGXiaominewES, BgoFErTaSchInA10, BG10Xiaomibank, BG10XiaomiBankCZ, BgcLuBofErtA10, BGXiaomi30BRC, BG11Xiaomi10000, BGCuponation10, BG3Xiaomi15ES, 13f142, BGHONEY2110, BG9E80BB
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi PLM09ZM 10000mAh Power Bank 2 ($-3)
2. Europe – Xiaomi PLM09ZM 10000mAh Power Bank 2 [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi PLM09ZM 10000mAh Power Bank 2 Silver. The lowest price was: $14.59.
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)).