You can get Bikight Bright USB C Rechargeable LED Headlamp with 18650 for $13.79 with coupon (from Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Bikight Super Bright Portable USB C Rechargeable Aluminum Alloy LED Headlamp with 18650 Battery Flashlights Head Light – Pure White
Latest coupon code price check (UTC time):
Banggood ($13.79)
Banggood warehouse is located in China. Is it cheap? I have never seen better price than the current one in CouponsFromChina database, so it’s the best! I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Price without coupon: $22.95
1. ($13.79): BGCMP89
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Bikight Bright USB C Rechargeable LED Headlamp with 18650? There we go.
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)).