Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Low voltage warning Yes, Lens Type Ar-coated lens, Number of batteries required 1, Size Head/body diameter 45.4mm/27.3mm, length 146.5mm, Product weight 166g, Tail stand Yes, Reflector Smooth, Maximum charging current 2A, Switch position Side, Battery charger includes Not included, Battery type required 1*21700 battery, Material Aluminum alloy, Reverse polarity protection Yes, Mode memory Yes
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Coupons for Convoy M21E XHP70.2 Flashlight? Nope, there’re no coupons in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG10OFFAFF1, FIN7289, BANGGOODSD, BGTorch4, 00c906, BGtorch2, BGtorch3
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Convoy M21E XHP70.2 Flashlight is here.
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)).