A system and method for wireless power transfer to an electronic device in motion, such as an inertial sensor assembly, is disclosed. In the method, a power level of a battery in the electronic device is monitored to determine whether the power level is at or below a prescribed threshold. One or more internal power ports of the electronic device are aligned with one or more external power ports when the power level is at or below the prescribed threshold. A wireless power signal is transmitted from the one or more external power ports to the one or more internal power ports. The power signal received by the one or more internal power ports is processed to charge the battery in the electronic device.