According to my DB the lowest price is 8.99 USD for 29W Car Charger 2.4A (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood (8.99 USD)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Is it expensive? Well, this price is higher than average price (5.49 USD)
Link: Banggood product page
Price: 8.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG845979, BGLMQ15, BGCAR639
(these coupons are old, so probably won’t work)
Aliexpress
Click here… to search for 29W Car Charger 2.4A QC3.0 2 Ports on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for 29W Car Charger 2.4A QC3.0 2 Ports? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).