A smoke alarm detector is a small device that can be mounted on the ceilings in your house, this is so it can detect smoke from a house fire immediately, to warn you there is a fire in your house and to alert you to call the fire engine and get out of the building soon as possible, to save your life. A fire alarm detector is usually powered by a 9 volt square shaped battery inside the plastic casing. It is recommend by most fire alarm experts, to test your fire alarm at least once a week, to ensure that the battery is not dead, as if there is a fire in your house and the battery is dead, the smoke alarm wont detect smoke from the fire and wont beep out loud, to alert you. If the battery in your fire alarm is dead or is dying, then you will need to replace it with a brand new battery, watch the video tutorial below because is shows you how:
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