US Patent 10522035 Navigation systems for a vehicle and an auxilliary vehicle

A navigation system for a vehicle and an auxiliary vehicle comprises a processing module configured to obtain information on an energy level of a power source in the auxiliary vehicle and determine a remaining traveling range of the auxiliary vehicle based on the energy level; and a navigation module configured to suggest at least one stop for the vehicle between a starting place and a destination based on the remaining traveling range of the auxiliary vehicle and an environment condition.