Murata purchased Sony battery line in 2019 and is now producing batteries with the same high performance and reliability, taking advantage of 40+ years of technology development and manufacturing expertise. These Murata CR2450 batteries are the perfect long-lasting replacement for all your personal devices including keyfobs, blood sugar monitors, remote controls, digital thermometers, toys, calculators, and more. Operating temperature: -30°C to +70°C (standard) -40°C to +125°C (heat-resistant). Nominal Capacity: 610mAh