Battery life determination

Details Battery life determination Battery life determination

2007-10-23

2007-10-23

Tso, Edward H (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

Reexamination Certificate

active

10793879

ABSTRACT:
A method and apparatus are disclosed for providing a battery low voltage warning for a range of batteries having various initial voltages. When a battery is inserted into a battery holder its initial off-load voltage is measured using a microprocessor. The microprocessor selects a suitable voltage threshold, at which the battery is considered to be discharged, from a predetermined number of voltage thresholds. The initial off-load voltage of the battery is used by the microprocessor as a basis for selecting a suitable threshold. An LED warning or the like is used to indicate that the threshold is reached in use. A measurement probe is shown which uses such a method and apparatus.

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