Ener 9v Lith Battery

Energizer, 9V, Ultimate Lithium Battery, Up To 10 Year Back Up Battery In AC Powered Smoke Detectors, Last Up To 20% Longer In Toys, Weighs 1/4 Less Than Standard Alkaline, Perform In Extreme Temperatures From -40 Degrees Fahrenheit To 140 Degrees Fahrenheit, Leak Resistant Construction.