Advanced Lithium BatteriesAdvanced performance for high-tech devices. Delivers up four times the life-span of ordinary alkaline batteries in digital cameras. Lasts up to 30% longer in MP3 and CD players. Weighs 33% less than ordinary alkaline batteries. Provides reliable performance in extreme temperatures from -40° F to +140° F. Offers an excellent cost to performance ratio for high-tech power at a great price. Battery Type: Lithium; Battery Size: AA.