| 摘要 |
PURPOSE:To easily know the time point for changing of each battery by detecting the electromotive force of each battery and displaying the calculating result of the remaining capacity of each battery. CONSTITUTION:When a prescribed command is sent to a microcomputer 5 from a keyboard, the microcomputer 5 calculates the remaining capacity of batteries 1 and 2 based on the detecting results of the current detecting circuits 3 and 4 respectively. At the same time, the remaining capacity of both batteries are displayed at a display part 6 in the form of bar graphs. Then the bar graph of the working battery 1 or 2 is displayed by blinking, etc. Thus the time point for changing of each battery is easily known. |
