Emergency Power - Midland WR-100 Owner's Manual

A DC powered device using 12 Volts or less and requiring less than
200mA of current can be switched directly using the EXT. ALERT jack.
Observe the polarity of the jack so that the negative side of the external
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power source is connected to the body of the / inch (3.5mm) phone
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plug and the device is connected to the positive source and to the tip of
the phone plug.
The internal switch is closed when an alert is received. Pressing any
button on the front of the monitor will open the switch.

EMERGENCY POWER.

See "Quick Start Instructions" for battery installation.
Connecting Power. The AC power adapter is recommended for normal
operation if the Weather Receiver is to be in service for more than a few
hours.
Backup Batteries are also recommended during normal operation. The
condition of the batteries is monitored by the Weather Receiver. When
the "Low Battery" icon flashes on the display, the battery has
been discharged and should be replaced. Do not leave a dead or weak
battery in the monitor. Do not leave a battery in the monitor when it is
not in use. The battery may leak and possibly damage your Weather
Receiver. Dispose of batteries properly.
Your MIDLAND Weather Receiver can be emergency powered by (3)
AA alkaline batteries. In an emergency situation, (3) AA alkaline
batteries should provide approximately 24 hours of continuous
operation. The clock will run for at least 10 days on batteries when the
monitor is turned off with the MONITOR ON / OFF control.
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