$10.99 – 12-24V QC 3.0 Dual USB Charger (Banggood, Aliexpress: 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 (the best price with coupon)).
12-24V QC 3.0 Dual USB Charger is for $10.99 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($10.99)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. Good or bad price? This price is higher than average price ($10.00) for this item.
Link: Banggood product page
Price: $10.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGSCM75, BG589b2e, BGSCM11, BGCAR639, BGAMMT03
(these coupons are old, so probably won’t work)
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
Do you need price history chart (for all/most countries) for 12-24V QC 3.0 Dual USB Charger? There we go. The lowest price was: $9.34.
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)).