First Alert 4120B User Manual

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3901 Liberty Street Road • Aurora, Illinois 60504-8122

4120B REPLACEMENT BATTERY RECOMMENDATIONS

Aurora, Ill. (June, 2005) – BRK Brands, Inc. recommends that when consumers replace the
batteries in their BRK Brand hardwired battery back-up smoke alarms, models 4120B and
4120SB, manufactured prior to October 2000, they use replacement batteries that are of
the same brand as those provided with the alarm upon purchase. The recommended
replacement batteries for this model are the Eveready batteries numbered 1222 or 522.
Using a replacement battery that is the same brand as the original battery for these models
will ensure the optimal performance of both the smoke alarm and the battery. It has come
to our attention that other battery types may bulge or open inside the alarm possibly
exposing the internal parts and material of the battery. If so, the consumer should always
exercise caution when replacing, and should wash their hands after handling and not touch
their eyes.

First Alert also reminds consumers to periodically change the batteries in their smoke
alarms and to test the alarms weekly by pressing the units’ test buttons to ensure that the
batteries and all alarm functions are working properly. Remember to never remove the
batteries to stop an unwanted alarm or “nuisance” alarm, such as those caused by cooking
smoke. According to the NFPA, smoke alarms are credited with reducing home fire deaths
by 50%, and the primary reason smoke alarms do not sound in a fire death is due to
missing, disconnected, or dead batteries.

To learn more about protecting your family from smoke and fire, and for a home escape
plan diagram, visit www.BRKElectronics.com or call 1-800-323-9005.

For more than 25 years BRK Brands, Inc. has been the manufacturer of First Alert® branded
home safety products including smoke alarms, carbon monoxide alarms, fire extinguishers,
and escape ladders. Such products are also manufactured and marketed under the BRK
Electronics® brand for the builder and contractor audiences. BRK Brands, Inc. products are
found in more than 30 countries worldwide. BRK Brands, Inc. is headquartered in Aurora,
Ill. For more information, visit www.firstalert.com or www.brkelectronics.com.

First Alert® is a registered trademark of The First Alert Trust, Aurora, IL 60504
BRK Electronics® is a registered trademark of BRK Brands, Inc., Aurora, IL 60504