Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
Coupon (11.17 USD): BG85d5c6
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): TTxBG10, AFfbG10, BGVDay10%off, BGBAK15, bGhOnEy10, BGXMI15, BGdragonBoat, BGAFF10OFF, BgoFErTaSchInA10, BgcLuBofErtA10, BGCLUBOFERTA10, BG20CHARGER, BGMBCBLE, BGHONEY2110, 13f142, BANGGOODSD
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Bakeey FN05 Dual USB Car Charger.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).