How Long Does a 9V Battery Last in a Fire Alarm?

Answer Smoke alarms provide vital early warning of a fire, giving people more preparation and escape time. The 9V battery common to many fire alarms needs regular changing and testing to ensure the alarm ... Read More »

Top Q&A For: How Long Does a 9V Battery Last in a Fire Alarm

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How long does an 80 WHr battery last?

The 80 WHr batteries are marketed by Dell for its Inspiron line of computers. They have nine cells and, when new, have a running time between four and five hours. This time decreases over the life ... Read More »

How long does the battery last in a pacemaker?

A pacemaker battery should last five to 10 years. The lifespan varies because the pacemaker uses a minimal amount of power when the heart is beating normally. The more defective a heartbeat is, the... Read More »

How long does a car battery usually last?

The life of a car battery depends on the make of the battery (the brand) and how well the battery has been taken care of. Newly manufactured batteries have a longer-lasting capacity than batteries ... Read More »