The battery life of First Alert alarms can vary depending on the specific model and type of alarm being used. For most battery-powered smoke detectors and carbon monoxide alarms, the typical battery life is generally between five to ten years. First Alert recommends that you check the user manual for your specific model to determine the exact battery specifications and lifespan. It is also important to remember that even if the battery has not reached its expected life, it is advised to replace the battery at least once a year to ensure optimal performance. Additionally, some First Alert models come with sealed lithium batteries that do not require replacement and are designed to last the entire life of the alarm, usually around ten years. For the most accurate and up-to-date information, look on the current First Alert website.
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