| 摘要 |
In a microcomputer-controlled rechargeable battery accommodating unit, such as battery pack, of the type having only positive and negative terminals, when the battery voltage is lower than the lowest limit level that the battery is usable, the drive voltage to boot and operate the microcomputer is generated based on the voltage supplied from a battery charger, since the battery voltage is not as high as to generate the drive voltage. Such a low-voltage battery is charged in a precharge mode precedent to a regular charge mode. |
