I have checked all old coupons and price is 39.09 USD for RC Battery (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest price update (UTC time):
Banggood (39.09 USD)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Low/high price? From what I can see this price is higher than average price (34.55 USD).
Link: Banggood product page
Price: 39.09 USD
Old coupons (from the oldest to the newest): BGGutscheine, BGToys8, BG8OFFCOUPON, TTBLACK5, BGMatt2022, BG589b2e, BG8FORMULAMX
(these coupons are old, so probably won’t work)
Aliexpress
Click here… to search for ZOP Power 11.1V 7000mAh 60C 3S RC Battery XT60 on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for ZOP Power 11.1V 7000mAh 60C 3S RC Battery XT60 is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).