Connector USB 2.0, Size 80*30*81mm, Color Black, Circuit board Intelligent IC, could automatic recognition the exact output, Net weight 223g, Output DC5V 9.6A, Input DC12-24V.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($15.21): BGCARELEC
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, e2bcea, BgAuMotor, b71c67, AM15prime, AMPrime01, BGCar1val, BGAutos
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for Viofo Car Charger is here. The lowest price was: $12.79.
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)).