Eveready 1250 Black D Battery x 2 Blister Pack gives you long-lasting power for demanding devices. Leak Resistance. Hold power for up to 3 years (when not in use). Zero Added Mercury and Cadmium. Quality Seal for Trusted Power. Super heavy-duty carbon zinc batteries. Battery Voltage: 1.5 Volts. Operating Temp: -18ºC to 55ºC (0ºF to 130ºF).