An auxiliary power pack for a vehicle includes an energy harvesting system for converting energy from an ambient environment into electrical power, a storage device in communication with the energy harvesting device for storing energy in response to the electrical power, and an output interface in communication with the storage device for supplying the stored energy to an electronic device. The power pack further includes a portable housing for the energy harvesting system, the storage device and the output interface. The housing is configured for removable mounting to a vehicle.