Abstract: A method for charging a rechargeable battery of a body-worn electronic device includes obtaining, by charging circuitry of a charger, a voltage of the battery prior to charging the battery, the charging circuitry in electrical communication with a power source (e.g., an energy storage device) and the battery and comparing the battery voltage to a voltage threshold. When the battery voltage is less than the voltage threshold, the method also includes applying predetermined current pulses to the battery with power provided from the power source (e.g., energy storage device) to simultaneously charge the battery and power electrical components of the device. The method also includes setting a timer when the battery voltage reaches a predetermined voltage and ceases application of the current pulses to the battery when the timer indicates that a predetermined time has elapsed.

Abstract: A corrosion resistant structure for a sodium-sulfur cell is described which comprises a container structure for the sulfur cathode including an outer metallic container having an inner surface defining a volume for containing the cathode, a layer of glass on the inner surface of the container, and a current collector of metallic foil disposed within the container adjacent the glass layer for containing the cathode. A preferred embodiment includes stainless steel as the container material and molybdenum foil as the current collector material.