Kidde KN-COSM-BA - Manual (Page 21)

Battery Replacement
Replace batteries with one of the following approved brands:
Duracell MN1500, MX1500, Energizer E91, Gold Peak 15A or
Golden Power GLR6A . These batteries can be purchased at your
local retailer.
WARNING! Use only the batteries specified. Use of different
batteries may have a detrimental effect on the Smoke/CO alarm.
A good safety measure is to replace the batteries twice a year, at
the same time. A good safety measure is to replace the batteries
twice a year, at the same time you change your clocks for
daylight saving time.
End of Life Notification
Ten (10) years after unit is first powered, this alarm will beep two
times every 30 seconds to indicate it is time to replace the alarm.
REPLACE IMMEDIATELY! IT WILL NOT DETECT CO IN THIS
CONDITION.
End of Life Hush can be activated by pushing the test
button to silence the End of Life chirp for approximately 3
days at a time for a maximum of 30 day life extension.
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