Abstract: A vehicle includes a control system and an electric energy battery system coupled to the control system; an electric energy consumption prediction module is coupled to the control system; a gyro is coupled to the control system to detect a road condition, and transmitted the detected road condition to the control system; wherein the electric energy consumption prediction module is in responsive to the detected road condition to generate a predict information for predicting a remaining travel distance of said vehicle.

Abstract: A portable device comprises a processing unit embedded in the portable device; a transmission module coupled to the processing unit for wireless communication; an inert navigator module coupled to the processing unit for measure geography information, wherein the inert navigator module includes gyro, accelerator or the combination thereof; an electronic map module stored in the portable device or a remote server to provide geography map; a display and an input unit coupled to the processing unit to display the geography map, wherein the geography information of the portable device measured by the inert navigator module is displayed on the geography map to indicate the location of the portable device. A calibrator is coupled to the portable device to calibrate the inert navigator module.