I have a RadWagon on it's way to me. As batteries (along with other parts) becomes more readily available, I plan on running 2 battery packs to extend the range of the bike.

Question, I am regulated to purchasing a 48V aftermarket battery if I plan on using the OEM battery (since it is 48V) or can I safely use a 52V battery pack in conjuntion?

This is provided I upgrade the controller and purchase the associated connectors as well.

Thanks.