| 摘要 |
<p>A system for alerting a low battery charge condition in a portable jump-starter includes a first battery configured to provide a first battery voltage and a voltage comparison circuit that is electrically connected to the positive terminal and the negative terminal of the first battery to compare a reference voltage to the first battery voltage. The system includes an alert circuit electrically connected to the voltage comparison circuit capable of generating an output signal for a speaker. The system also includes an enable/disable switch including a stopper tap. The alert circuit is configured, when enabled, to cause an audible alert when the first battery voltage is less than the reference voltage. When disabled, the alert circuit will not cause the audible alert. The system also includes a display circuit to visually indicate the first battery voltage.</p> |
