Battery cost for a battery that can go 100 miles?

[bike_riders33]

Not sure if this is the right area for posting. Im newer to e-bike
im curious what would the cost for a battery that could go 100 miles at 10-20mph cost?
if i were to buy from aliexpress or alibaba would i be wrong on doing that? if it was usa > usa what would cost be? vs doing it from china

 

[HumanPerson]

Welcome to our humble home

Here are some batterys to check out,

https://www.e-streetbikes.store/shop
https://custom-ebike.com/collections/batteries
Hope that helps