Red 7.4V 1500mAh 2S 25C XT60 RC Battery (Banggood, Aliexpress: Red 7.4V 1300mah/1500mAh 2S 25C XT60 Plug Lipo Battery RC Car Boat Vehicles Models Spare Parts – 15000mAh (the best price with coupon)).
Go down and check coupons out. Remember to check price history if it is available. What is best price?
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.
Link: Banggood product page
1. ($4.18): BGee93d8
2. ($8.94): BG589b2e
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG3bd2d0
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Red 7.4V 1500mAh 2S 25C XT60 RC Battery? There we go. The lowest price was: $4.18.
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)).