$7.99 – Name USB Charger Plug, Color Red / Green / Blue, Material Aluminum + ABS, Input 12V / 24V, Output 12V / 1.5A; 9V / 2A; 5V/3.6A, Reverse connection protection support, Power 36W Dual USB.
Use coupon and get 12-24V QC 3.0 Dual USB Charger for $7.99 (from Banggood). Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($7.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. The question is – is it a good price? This is the best price in history according to CouponsFromChina database!
Link: Banggood product page
Price: $7.99
Additional Banggood coupons: first page and second page
This is the best price ever noted in my database!
Old coupons (from the oldest to the newest): BGSCM75, BG589b2e, BGSCM11, BGCAR639, BGAMMT03
(I don’t think these’re gonna work, but you can try ’em out anyway)
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.
Price history and price alert
Here is price history (for all/most countries) for 12-24V QC 3.0 Dual USB Charger. The lowest price was: $7.99.
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)).