Energizer L91 Ultimate Lithium Battery AA Size - 4 Pack Features: The worlds longest lasting AA battery in high-tech devices Lasts up to 7 X longer in digital cameras* Carries a 15 year shelf life 33% lighter than alkaline AA Takes up to 600 pictures** Performs well in extreme temperatures (from -40C to +60C) Lasts up to 3.5 hours longer than leading ordinary alkaline alkaline in CD players Up to 12 CD player hours*** Mercury and Cadmium free with leak resistant construction