Basically copy coupon, view price history or create e-mail price alert. What is best price?
Input Current: DC5V=2A (Max), Output Current: DC 5V=2.1A (Max), Temperature Adjustment: 3gear, Heating Power 8-11W, Battery Capacity: 10000mAh, Rated Capacity: 6000mAh (5V=2.1A), Model: N7, Brand: Solove, Maximum Continuous Heating Time: 8h
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There are no coupons available at this moment 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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGHOMEA13, BGCuponation10, 13f142, BG10OFFAFF, 6GSGIT
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Solove N7 Hand Warmer Power Bank 10000mAh is here.
Price records source(s): 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)).