| 摘要 |
<p>PROBLEM TO BE SOLVED: To anticipate accurate charging time by providing a battery capacity detecting means of a secondary battery and a charging current detecting means, providing a battery pack having a charging current detected by the charging current detecting means and residual charging time data corresponding to capacity of the battery capacity detecting means, and determining residual charging time. SOLUTION: Electronic equipment is desirably provided with a battery capacity detecting means of a secondary battery and a charging current receiving means for receiving a charging current from a device main body or an expander, and is provided with charging current data received by the charging current receiving means of a battery pack and residual charging time data corresponding to capacity of the battery capacity detecting means to determine residual charging time. The battery pack is desirably provided with a means for transmitting residual charging time information determined by a residual charging time calculating means to the device main body or the expander, the device main body or the expander is provided with a charging current detecting means, and is provided with a means for transmitting the charging current to the battery pack to transmit predetermined plural fixed charging current values to the battery pack.</p> |
