Ensure your home stays safe with the Kidde 9-Volt Smoke Detector Replacement Battery. Designed for easy replacement, these batteries can be swapped in just minutes when your current batteries run out of power. Kidde batteries provide reliable energy to keep your smoke and carbon monoxide alarms functioning effectively, boasting an estimated lifespan of up to two years. They work seamlessly with all Kidde models as well as other carbon monoxide detectors. Beyond smoke alarms, these versatile batteries are suitable for a range of electronic devices, making them a practical choice for any setting. Each convenient pack contains two batteries, perfect for use at home or in the office, ensuring you always have a backup ready when you need it.