Kidde KN-COB-IC Manual page 15

120 v a.c. carbon monoxide alarm with interconnect
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Battery Replacement (If Equipped)
THIS CO ALARM IS NOT BATTERY OPERATED.
FOR ALARMS EQUIPPED WITH 9V BATTERY BACK-UP,
THE 9 VOLT BATTERY IS TO SUPPLY SHORT TERM
BACKUP DURING POWER OUTAGE.
When replacing the battery, use one of the following
approved brands:
MN1604 or MX1604
Duracell
Energizer 522
Gold Peak 1604A
These batteries can be purchased where you bought the
alarm or at a local hardware store. Use of a different
battery may have a detrimental effect on the alarm
operation.
The 9 volt battery is not rechargeable. If the 9 volt battery
is missing, disconnected, or if the battery's power is low, a
red LED flash will occur once every 15 seconds,
accompanied by an audible beep. If this happens, the
battery must be replaced.
IMPORTANT: Constant exposures to high or low humidity
may reduce battery life. A good safety measure is to
replace the battery at least once a year, or at the same
time as you change your clocks for daylight saving time.
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