The Kidde 21006378 fire alarm can operates on a 120V power source. However, in the case of unavailable power source, a 9V battery backup can maintain the job and its included in the package.
fire
Apart from smoke alarms, Kidde make many different safety appliances. They also make fire extinguishers, carbon monoxide alarms, escape ladders, key safes, locks and many more.
It is pronounced Kidd-E as in "Kiddie." That is incorrect. The word "Kidde" is not in the dictionary. It is however a fire safety company named after its founder Walter Kidde, and it's pronounced (Kidd-Uh). I work for the company so I would know.
First Alert's
D Batteries are large cylinders. They are used in toys and other electronics that require a lot of energy, they are also used in several fire alarm models. They are common, and easy to find.
Fire Alarm
Fire departments encourage citizens to replace the battery , or batteries , in the Smoke - Alarm(s) .
so that when there is a fire in their house or something and people are unaware of it....the smoke will start the alarm and then the person will do something about it...it basically lets them know that there is a fire.
Actually it kind of is but if you want to remove you're fear then replace your fire alarm batteries EVERY month and keep ALL flammible things in a small almost oxygenless area
The fire alarm rang
Fire alarm control panels are powered by the mains power. Commonly, the fire alarm will have a battery back up power in place so that the system still remains functional and powered up when the mains fails. When the mains is powering the panel, the batteries are charged fully so that when a power cut occurs, they have enough power to operate the system for a certain amount of time. Generally, in the UK, a panel is powered by 240 Volts and is stepped down by a transformer to 24 Volts. The panel will usually have two, 12 Volt batteries installed in the panel- they are reffered to as SLA's. (Sealed Lead Acid). These batteries though will only last for about a day or two. Some systems are larger and have more power drain, so they may be required to have additional backup batteries connected and perhaps spares available on site. If the fire alarm system is non-operational, the local fire authorities may require a company to post a 24-hour "fire warden", in case of fire, with adequate training and equipment, or otherwise shutter the business until the alarm is working.
There is no particular standard for batteries in fire alarms (or smoke alarms). They may be sealed and non-replaceable (you dispose of the entire unit after ten years); or 9-volt radio batteries, or AA-size alkaline cells, or similar. In a fire-alarm control panel the battery backup unit is often a sealed lead-acid battery (12 volts or 24 volts), which must also be replaced from time to time.