Description Product OverviewPower up your essential devices with Electryx⢠9 Volt Ultra Alkaline Batteries.Mercury-free batteries designed for long-lasting performance in high-drain devices like smoke detectors and carbon monoxide alarms.Ultra-alkaline technology ensures dependable performance, keeping your critical devices running longer.Electryx batteries provide ultimate power at maximum value for both safety and electronic devices.Key Features4-pack 9 volt batteries.Ultra alkaline & mercury-free formula.High performance, long-lasting power at a great value.Ideal for powering essential devices such as smoke detectors, carbon monoxide alarms, security systems, etc.