Patent ID: 7729207

Claim:
An electronic timepiece with a generator function, comprising: a generating means; a storage means that stores electrical energy produced by the generating means; a timekeeping control means that is driven by the electrical energy stored in the storage means; a time display means that is controlled by the timekeeping control means and displays time; a memory means that stores a predetermined relationship between peak values and corresponding average values of an electrical characteristic of power output by the generator means; a generator output detection means samples the electrical characteristic of the power output by the generating means, detects a peak value of the electrical characteristic in each sampling period, and retrieves from the memory means an average value corresponding to each of the detected peak values of the electrical characteristic; a remaining operating time calculation means that integrates one or more of the average values, and calculates a remaining operating time based on the integration; and a remaining operating time display means that displays the remaining operating time calculated by the remaining operating time calculation means.