Tattu R-Line Version 5.0 22.2V 1400mAh 150C 6S1P RC Battery XT60 (Banggood, Aliexpress: Discharge Plug: XT60, Discharge Rate: 150C, Dimensions: 78mmx 39mmx 42mm (Lx Wx H), Configuration: 6S1P / 22.2V / 6 Cells, Minimum Capacity: 1400mAh, Charge Plug: JST-XHR, Max Burst Discharge Rate: 260C, Net Weight(±20g): 222g (the best price with coupon)).
Check coupons or create price alert down below. Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($49.72): BGToys8
2. ($49.72): BG8OFFCOUPON
3. ($49.72): TTBLACK5
just apply this code 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): Cuponation9, BGGutscheine
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for Tattu R-Line Version 5.0 22.2V 1400mAh 150C 6S1P RC Battery XT60. The lowest price was: $42.99.
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)).