4.7AC Outlet Switch
The AC outlet has an ON/OFF switch (located above the AC outlet) which illuminates when the switch is turned on indicating power is available at the AC outlet.
4.8Audio Alarm
Three types of conditions will set off the audio alarm. A low battery voltage condition, an over-temperature condition, and a reverse polarity connection. (See Sections 4.3 and 5.3.)
4.9Jumper Cable Port
The Jumper Cable Port supplies high-power DC current and is located on the lower left side of the unit. This port is wired directly to the internal battery. The Jump-Start Cables supplied connect to the Jumper Cable Port when you need to boost a vehicle’s starting battery. Be sure to read Section 7 for full details before attempting to jump-start a vehicle. This port can also be used to connect an external battery to Portable Power 250 to increase operating time. See Section 9 for more information.