Battery circuit with non-volitable memory and thermistor on a single line

A battery charging system comprising:

• a battery charger;
• a battery;
• a thermistor, with a first end and a second end;
• a memory device;
• a plurality of contacts adapted to be communicatively coupled with the battery charger including
• a battery data contact,
• a battery clock contact;
• and
• a memory device;
• wherein the battery charger selectively performs at least one of clocking the memory device and reading a value of the thermistor, through one of the battery charger clock contact and the battery data contact
• wherein the memory device comprises a data port communicatively coupled to the battery data contact and a first end of a voltage identifying element, and a clock port communicatively coupled to the battery clock contact and the first end of the thermistor;
• and
• wherein the voltage identifying element includes a second end, the first end of the voltage identifying element being communicatively coupled to the battery data contact, for identifying a voltage at the battery data contact, and a switch, communicatively coupled between the second end of the thermistor and the second end of the voltage identifying element, for selectively reading a value of the thermistor and outputting a clock signal to a memory device clock port.