A physiologic sensor pod comprises a housing, and first and second electrodes on a bottom surface of the housing and spaced apart from one another. Within the housing is a battery, a battery charging circuit, an electrocardiogram (ECG) sensor circuit powered by the battery and adapted to sense an ECG signal, and a reset detection circuit. The battery charging circuit is adapted to charge the battery when the first and second electrodes of the physiologic sensor pod are placed in contact with first and second electrical contacts of a charging unit. The ECG sensor circuit is adapted to obtain an ECG signal while the first and second electrodes are placed against a user's chest. The reset detection circuit is adapted to output a reset signal, which causes the physiologic sensor pod to be reset, when a voltage between the first and second electrodes is greater than a reset threshold level.
