How To Change Battery I Kidde Model P12040 Smoke Alarm

Kidde recommends replacing the batteries in all of your alarms at least once a year, or any time the unit indicates that the battery is low. The full general rule is to replace the battery twice a twelvemonth: once when y'all switch to daylight savings time, and in one case when y'all switch back to daylight standard time.

When the battery requires replacement, the alarm will sound with a brusque beep or chirp. At this time, you lot must remove the old battery and supersede it with a fresh battery of similar brand. Hither'due south how to change the battery in your smoke detector:

To supplant batteries in models with rear-loading batteries

If your tamper-resist pivot is engaged, it volition need to be removed. If you take a tamper-resist locking tab, it will need to be pushed in with a screwdriver before you tin can twist the alarm and remove information technology from the subclass.

Remove the alarm from the mounting plate by twisting it in the direction of the Off arrow on the plate.
If you take an AC Hardwired (Interconnected) alarm, you will demand to remove the Quick Connect wire harness from the dorsum of the alert by squeezing the plastic prongs and pulling the wire harness out of the alert.
After the alert has been removed, open the bombardment compartment door.
Insert the battery past commencement pressing the ruby battery reminder finger down into compartment. Note: Be sure the battery'south connectors (+ and -) line upwardly with the metal plates inside the battery compartment.
Once the battery is installed, close the compartment door and press the test button to make certain the unit of measurement operates on battery only before installing the unit dorsum on the ceiling. If the unit does non sound, re-open the battery compartment door to make sure the cherry-red reminder pins are pressed downwardly and that the batteries are lined upward properly.
If yous have an Air conditioning Hardwired (Interconnected) alarm, you volition then demand to re-connect the Quick Connect wire harness to the back of the warning before installing the unit back on the mounting bracket. Line up the Quick Connect wire harness holes with the pins on the back of the alarm. And so, clasp the wire harness' plastic prongs together and push the wire harness into the unit until it snaps into place.
Re-install the alarm onto the mounting bracket by twisting it in the direction of the On pointer on the plate.

For detailed instructions and diagrams, consult your user's manual.

To replace batteries in models with front-loading batteries

Open the bombardment compartment door by pressing down on the battery compartment door, so release to allow the door to pop open. Pull the bombardment direct out of the compartment.
Insert the bombardment into the compartment. Make certain the battery's connectors (+ -) are facing out. Line up the plus (+) and minus (-) connectors with the xanthous label on the bottom of the battery compartment.
Once the battery is inserted, printing downward on the bombardment compartment door until it snaps into the closed position. If the bombardment door slides open, brand sure information technology's open all the way before removing and installing the new battery(ies). For models using AA batteries, make certain the contacts are non facing the same direction.
NOTE: A missing or improperly installed bombardment will prevent the battery compartment from closing.
Press the test push to make sure the unit operates on battery only before installing the unit back on the ceiling. If the unit of measurement does not sound, re-open the battery compartment door to make sure that the batteries are lined upward properly.