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It depends on your city's fire codes, most likely yes. "Wired" alarms could either mean "wired to AC power" or "wired to an alarm panel" or both.

Start by calling your local fire alarm installer or electrician. Assuming that the detectors are wired to a central hub in the house/building (fire alarm control panel), the panel would normally have a battery back-up installed. For individual units wired to AC, having a battery back up would be safer, no matter what the laws. Some units will automatically remind you when the battery is low, even though the unit is on AC power, since the smoke alarm must continue to function if power is off for some reason.

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11y ago
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11y ago

Nearly all smoke alarms are electric and have a battery for backup power if not also primary power (when not connected to electrical mains wiring).

Some types operate on 9v batteries; others use two or more 1.5-volt batteries, often in the standard AA size.

Larger alarm systems with panels often use sealed lead-acid batteries for 12 volts at around 7 ampere-hours, although larger systems will require larger batteries so that the smoke detectors continue working during an extended outage (over 4 hours) and have enough power to sound the alarm.

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13y ago

Most "home-type" smoke detectors, usually termed residential smoke detectors, use a 9-volt "transistor" battery.

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Q: Does an electric smoke alarm have a battery?
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Related questions

How do you shut off a smoke alarm that doesn't have a battery but runs on electric?

Hit it with a hammer...or disconnect the wires and reconnect them


Why is smoke alarm clicking?

new battery


Location of backup battery for smoke alarm?

In the alarm panel box or an auxiliary box nearby.


How a fire alarm would be raised?

The fire alarm device is usually equipped with an Amercium-241 that is alpha emitter source together with a battery derived electric circuit. In the normal situation the alpha particles ionize the air causing circuit connection. However when there is a smoke the circuit is disconnected due to the smoke that acts as an insulator and hence the alarm is actuated.


Why does your smoke alarm start beeping when you use your treadmill?

The most likely reason your smoke alarm starts beeping when you are on the treadmill is it needs a new battery. It is a coincidence that you are on the treadmill when it is alerting you.


How often of a smoke alarm battery?

You should replace your batteries every 6 months. Smoke detectors save lives!


How can you keep the smoke detector from beeping temporarily?

Push the button, or take the battery's out (not recommended) In many modern smoke alarms it is impossible to remove the battery, but there may be an on/off switch that can be actuated with a tool. If the alarm is beeping because the battery is dead, replace the battery or the entire alarm unit, which should be done every ten years anyway. Removing a battery in any smoke detector could be criminal "tampering", if anyone gets hurt because of it.


How do you change the battery in a smoke detector?

Smoke alarm batteries are easy to replace, once you find where they go. The design varies from brand to brand. Usually, the battery is located on the side of the alarm, either in a "drawer" or a swinging compartment. There may be a small plastic latch holding it closed. Occasionally, it is necessary to remove the alarm from the wall or ceiling to find the battery compartment. This can be done by rotating the entire alarm counter-clockwise until it releases. The battery compartment is designed not to close if the battery is inserted incorrectly. Many smoke alarms have an option to permanently screw the battery compartment closed. This is typically done in rental units to prevent tenants from removing the battery during a false alarm. In this case, the landlord is required by law to change the battery. If you are the landlord, consult the alarm documentation (which can be found online) for instructions on how to remove the locking screw.


Why does the smoke alarm keep chirping after installing a new battery?

Two thoughts: you may have put the battery in wrong (if it's not all the way in, they chirp) or you may have put in a dead battery.


Why the Americium is used in smoke detectors?

In the smoke detector, the fast - moving alpha particles enable the air to conduct an electric current. As long as the electric current is flowing, the smoke detector is silent. The alarm is triggered when the flow of electric current is interrupted by smoke entering the detector.


What kind of particles does the emitter create in a smoke alarm?

Smoke alarms typically use photo-electric sensors or alpha-particle emitters, although the photo-electric sensors are much better for detecting smoldering fires.


Where would you not install a smoke alarm?

I would not install a smoke alarm, in the kitchen.