The Lemco GP CR2 3V Battery is a lithium cell designed to deliver reliable, long-lasting power for Nash Siren S3 and Nash Siren S5R alarms. Lithium chemistry performs consistently across a wide temperature range, from +60°C down to -40°C, and offers a long shelf life of around 8–9 years. These high-quality cells from GP outperform cheaper alternatives in the same role. - This CR2 lithium battery is the perfect battery to provide optimum life in Nash Siren S3 and Nash Siren S5R alarms - Lithium batteries work perfectly in a wide range of temperatures from +60°C to -40°C - They also have a long shelf life of around 8–9 years - These high quality Nash Siren S3 / S5R alarm batteries from GP outperform cheaper cells