Aliexpress
Click here… to search for ISDT Q6 Lite Balance Charger on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (43.05 USD): BG10BC
Coupon (43.05 USD): BGAFF10OFF
(CouponsFromChina.com tip: apply code in your basket (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): BGISDTQ6, Charger12, BGISDTQ6Lite2, BGQ6Lite1, AFfbG10, BGCITYADS2019, BGVDay10%off, BGMPB2020
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for ISDT Q6 Lite Balance Charger.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).