When I was updating this page, then coupon price was 18.99 USD for 2 in 1 ROCKBROS (in Banggood). Just check coupons out (with price alert and history). What is best price?
Latest coupon and price update (UTC):
Banggood (18.99 USD)
Banggood warehouse is located in China. Good or bad price? Wow! That’s the lowest price in CouponsFromChina database! Only one coupon available!
Link: Banggood product page
Price without coupon: 20.99 USD
Coupon (18.99 USD): BGTYFRI7
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
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More on Aliexpress… Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 2 in 1 ROCKBROS 5000mAh Battery Bike Headlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).