A smoke alarm is a excellent device that can detect if a fire is occurring and can alert you that there is a fire, by creating a loud "Alarm" beep sound, it is a device that can save your life. But if the battery in your smoke alarm is dead, flat or faulty, then the smoke alarm will not work and you will not know if there is a fire, this put your life at a high risk. So it is ideal to test the battery inside the smoke alarm, to ensure that it is getting enough power to work.
1)Get access to your smoke alarm, there should be a large button on the plastic casing that says "Test". Press the button down, if the smoke detector beeps, then the battery is fine and will not need replacing. If it doesnt beep then the battery is dead, or the unit doesnt have a battery attached to it.
2)There are some cheap fire alarms that dont have a "Test" button for you to press down and to check if the battery is dead. If you fire alarm doesnt have the test button, then remove the battery from the smoke alarm. It should be inside the smoke alarm and a 9 volt battery attached to a small battery snap should be connected to it. Once you have removed it, get a battery tester and insert the 9 volt battery onto it. If the needle on the battery tester swings to the area that says "Charged" then the battery is fine. If the needle on the battery tester doesnt swing at all, then the battery has no power and will need replacing.
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