We currently do not offer any battery upgrades for our bikes. While larger capacity batteries do exist, they are very expensive at this point in time. We do sell extra batteries for our bikes for $499 so you are able to carry two batteries with you on your trip to double your range!
We cannot recommend using any battery you did not purchase directly from Rad Power Bikes on your bike. We are not able to inspect the quality of the cells in third-party batteries and low-quality cells could damage your electrical system.