The Energizer Alkaline 6-Volt Battery is specifically formulated to provide long-lasting and dependable power for your everyday safety and security devices, such as smoke alarmsSpecifications and Features: Manufacturer Number 529-1.D5 Alkaline Zinc-Manganese Dioxide Dimensions 2.685"Lx2.685"Wx4.528"H Primary Type: Primary (Non-Rechargeable) Size: Lantern Operating Temperature: -18 to +55 degC Coil Spring Terminals Voltage, Rating 6 V Weight 1.956 lbs