TYPE-C: 5V 2A / 9V 2A”” / Model BW-P11 (Upgraded Version) / Size 143x71x30mm / Material PCBA / Polymer battery / Color Black / Total Power 20W(Max)”, “Battery Capacity 20000mAh / Net Weight 390g / Conversion Rate ≧85% / Inputs “”Micro USB: 5V 2A / 9V 2A.
You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
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 price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. CouponsFromChina software could not find any coupon for this product in Banggood. Sorry, but there’s no price history in my database.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 8BGwbg2204, BG20c8ca, tRaDetRaCKeR, 8wEbgaInS5, BG260a33, BGJUNEGSG9, BG42b973, Cuponation9
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – BlitzWolf BW-P11 Upgraded 20000mAh 20W PD 18W QC3.0 Power Bank ($-3)
Price history and price alert
Not enough data to show price history chart… $25.99 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).