$9.99 – QC3.0 USB Output: 4.5V/5A /5V/4.5A /9V/3A /12V/2.5A max, LED light color: Blue /Red /Green(optional), Product material: ABS, Size: 5.4X3.7X2.9 cm, Product Color: Black, input Voltage: DC 12V-24V, Type C PD Output: 5V/3A /9V/3A /12V/2.5A /15V/2A /20V/1.5A max.
You can get 12-24V 48W Dual USB Car Charger for $9.99 using coupon code (in 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 price update (UTC time):
Banggood ($9.99)
Banggood warehouse is located in China. Coupons for 12-24V 48W Dual USB Car Charger? Nope, there’re no coupons in Banggood. Is it good price? It’s a good price, isn’t it? The average is $10.49.
Link: Banggood product page
Price: $9.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG253d88, BGCarEle4, BG421c45, BGb3bdda, BG5549c0, BG997246, BGGRJAN2901, BGCarEle5, BGc9787e, BGLMQ15, BGSCM11, BGAMMT03
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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
Price history (for all/most countries) for 12-24V 48W Dual USB Car Charger is here. 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)).