The Duracell lasted 15 hours. When it comes to something as important as a smoke alarm for your home make sure you use reliable batteries. EN22 Energizer Industrial Alkaline 9V Battery.
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Battery issues 9V vs. Keep your home and family safe with long-lasting power Duracells 9V or Specialty batteries for smoke alarms. Advanced photoelectric sensor is especially effective in detecting smoldering fires. Nowadays though its much more common to find smoke detectors that use 23 AA batteries.
