ELECTRONIC DEVICE, METHOD OF CONTROLLING ELECTRONIC DEVICE, METHOD OF ESTIMATING CHARGE IN RECHARGEABLE BATTERY, AND METHOD OF CHARGING RECHARGEABLE BATTERY

摘要

A noncontact battery charger using electromagnetic induction having a signal transfer function. A station (100) having power supply means for charging rechargeable batteries begins transferring a signal after it finishes charging an electronic timepiece (200) provided with a built-in rechargeable battery for a predetermined time. This system functions to detect positional deviation, changing electric power/signal ratios, and detect changes in the rechargeable battery voltage to estimate the charge in the battery by referring to a conversion table.