According to my DB the lowest price is $16.09 for W678 Sensor Headlight XPG+COB (in Banggood). Check coupons or create price alert down below. Let’s see what best price is ATM.
Waterproof IPX4, Charging time 3h, Bulb XPG+COB, Batter 1*18650(built-in) 2000mAh, Running time 2-4h, Material ABS+PC, Charging Type-C, Size 153x36x33mm, Weight 81.8g, Color Black, Type “Focus Type
Zoom Type”, Mode “Main light: strong-low-flashing
Sub-light: strong-low-flashing”
Latest price update (UTC time):
Banggood ($16.09)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. The question is – is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $10.28)
Link: Banggood product page
Price: $16.09
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG2b7a28, BG0635fa, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, BGBIDA7, BG339942, BG434119, BG71c041, BGbhlight01, Cuponation9, 9OFFSUMMER, BGOutlight10, BG80e1e6, BG055956, BG589b2e, BGcharles03
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
FTOYIN COB Headlamp With Sensor Zoom 6 Light Modes Flashlight USB Rechargeable Built-in Battery Headlight Torch For Hunting Hike | $14.12 | – |
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for W678 Sensor Headlight XPG+COB.
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)).