The Saft 3.6 Volt 1/2 AA Lithium battery is a long lasting, high performance, high energy lithium battery. Exceptional consistency combined with a great price makes this 3.6 V 1/2 AA Lithium battery a great buy. 3.6 Volt 1 2 AA lithium batteries are great to use in temperature extremes of -60° C to 85° C. Each lithium battery 3.6 volt has a minimum 7 year shelf life.