When I was updating this page, then coupon price was 12.99 USD for GT13 Plus Mini Keychain Flashlight (in Banggood). Just check coupons out (with price alert and history). What is best price?
Latest coupon and price update (UTC):
Banggood (12.99 USD)
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now… Low/high price? Looks like this is great price. I didn’t track lower than that in CouponsFromChina database ever.
Link: Banggood product page
Price: 12.99 USD
12.99 USD – This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG589b2e, BGd57765
(these coupons are old, so probably won’t work)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for GT13 Plus Mini Keychain Flashlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).