If we notice that the batteries are draining more quickly than usual, then we should change the fire alarm and buy a new one. Then, the smoke alarm should be tested to make sure it is working fine.īesides, if the smoke alarm is too old then the batteries also may drain quickly. So, the batteries need to be further replaced with new ones. If we insert old batteries on our smoke alarm, it can start blinking red. There are several reasons for which a smoke alarm could blink red after changing the battery.
However, depending on the manufacturer it may also indicate the alarm has started to work perfectly or there is some dust inside the alarm. It may indicate that the batteries inserted are low.
It is not a big deal if the smoke alarm blinks red after changing the battery.
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