I have just checked coupons. The lowest price I could get is 339.99 USD for DRVETION 48V 10Ah Battery for Electric Bike (in Banggood). Just check coupons out (with price alert and history). You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood (339.99 USD)
Banggood warehouse is located in Hong Kong. As you can see I didn’t find any active coupon for this product right now… Is it expensive? Well, this price is higher than average price (335.99 USD)
Link: Banggood product page
Price: 339.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG863724, BG96949d, BG589b2e, BGAUGUST8, BGafbabd
(there’s a little possibility that old coupon will work)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for DRVETION 48V 10Ah Battery for Electric Bike? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).