Ok so I have narrowed my decision to two choices. I will be using one of these batteries with the ampedbike 500w rear hub motor.
Both batteries weigh exactly the same and are the same size and there is just a $15 difference between them.
I guess I have to chose between speed or distance. But the distance is only 5 miles (if 1ah=1 mile of non pedaling). If I pick the 48V battery I will get to where I am goinga bit faster, but if I go with the 36V I will be able to go a little bit further. By the way, I like to pedal, so it's not like I am going to turn my bike into a scooter or moped, I just need a little bit of assistance.
Any advice on which one I should go with?
Say the 36V battery is only good for 21-23mph tops. If I am at WOT at 23mph, would this somehow be not good for the battery, to be running at max?