ATM you can buy ENGWE X20 48V 7.8Ah Electric Bike Battery For ENGWE X20 [EU] for $283.12 (in Banggood). This is EU warehouse. Just check coupons out (with price alert and history). What is best price?
[EU DIRECT] ENGWE X20 48V 7.8AH Li-ion Battery Suitable For ENGWE X20 E-Bike
Latest coupon code price check (UTC time):
Banggood ($283.12)
Banggood warehouse is located in Europe 
. There is no active coupon in my database right now (for Banggood). Good or bad price? There’s only 1 record in my database, so I have no idea if the price is OK.
Link: Banggood product page
Price: $283.12
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Not enough data to show price history chart… $281.66 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).