System and method to deliver reset via power line

A power source device, comprising:

• one or more first contacts adapted to establish an electrical connection with a power receiver device;
• one or more voltage sources within the power source device adapted to generate a first voltage and a second voltage higher than the first voltage;
• and
• a power control unit configured to select one of the first voltage or the second voltage for transmission over the electrical connection, wherein the power control unit is configured to detect a reset-initiating event and select the second voltage in response to detecting the reset-initiating event.

A power receiver device, comprising:

• one or more contacts configured to establish an electrical connection with a power source device;
• a battery adapted to receive a charge through the electrical connection;
• and
• circuitry configured to differentiate a first voltage level received over the electrical connection from a second voltage level, higher than the first voltage level, received over the electrical connection, wherein the first voltage level is supplied to the battery for charging the battery, and wherein the second voltage level initiates a reset of firmware in the power receiver device,
• wherein the circuitry comprises a Zener diode activated by the second voltage level to initiate the reset of firmware in the power receiver device.