Ideal for smoke detectors and special applications: a reliable battery with a long lifespan and stable performance. The XCell Lithium 9V block features high capacity, long life, and stable operating voltage. It has been specifically designed for smoke detectors and is durable for up to 10 years. Perfect for use in hard-to-reach or critical applications. Safe and reliable operation even at extreme temperatures from -40 °C to +60 °C – ideal for unheated areas. It is optimally suited for use in smoke, fire, and gas detectors, alarm systems, measuring devices, protective devices, security technology, communication devices, music and audio equipment, or high-quality medical devices.