Wired output current: DC5V 2.1A, Wireless input current: 750mA, Wireless output current: 5W 1A, Wired input current: DC5V 2A.
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.
Updated:
Price history and price alert
Here is price history (for all/most countries) for K2 Wireless Power Bank 12000mAh. The lowest price was: $11.99.
Price records source(s): Gearbest
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)).