Murata produces batteries with excellent high performance and reliability, taking advantage of 40+ years of technology development and manufacturing expertise. These Murata 393/309 SR48/W/SW 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: -10°C to +60°C (standard). Nominal Capacity: 75mAh. Additional Details ------------------------------ Product description: 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 393/309 SR48/W/SW 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: -10°C to +60°C (standard). Nominal Capacity: 75mAh.