Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Weltool W4 Flashlight [EU] (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
Coupon (395.12 USD): BGOutlight10
(CouponsFromChina.com tip: just apply this code in your cart 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): BGTORCH, bGhOnEy10, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGFLS15, 4BLF, BGAFF10OFF, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGflashlight, BGdeals32, BGdeals54, BGdeals83, BG10OFFAFF1, BGdeals92, BANGGOODSD, BGTorch4, BGdeals247, BGdeals223, 00c906, BGtorch2, BGtorch3, BGAlerabat15, BGtorch7, BGLED07
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Weltool W4 Flashlight [EU] (-3 USD)
Price history and price alert
Price history (for all/most countries) for Weltool W4 Flashlight is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).