The smoke detector battery you can rely on!\nMany smoke detectors can only be used with alkaline batteries. These high quality batteries from ANSMANN offer the highest standard of reliability and safety as they are specifically designed for smoke detectors.\n\nLong-term durability\nThese Alkaline batteries offer you reliable performance and long-term durability. Therefore, they are ideal for use in smoke detectors. The next battery change and unpleasant beep "battery low in the smoke detector" can wait long and complicated battery replacement is seldom necessary. You also have the secure feeling that your smoke alarm in an emergency work correctly and could not fail due of a weak battery.\n\nTÜV approved\nThe batteries are tested to the strictest requirements in terms of safety and quality. Their proven performance (function, quality, longlife) is certificated by TÜV Saarland.\n\nTop performance even at extreme temperatures -10°C to +50°C\nThe strong 9V battery from ANSMANN is insensitive to extreme cold and hot temperatures. They maintain their performance in the smoke detector in unheated areas (for example, at minus temperatures in the barn, garden shed ...) or in extreme heat.