Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Cree XP-L V6, 1090 lm, 6400cd, 3500K, Battery Type: 18650, Rechargeable: Yes, Waterproof Standard: IPX-8 Standard Waterproof
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
Do you need price history chart (for all/most countries) for ONTHEROAD U18 3500K Flashlight? There we go.
Price records source(s): Gearbest
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)).