Energizer Ultimate Lithium L91 Series L91 Lithium Battery, Battery Chemistry: Lithium, Iron Disulfide, Battery Size: AA, Battery Capacity: 3000 mAh, Battery Voltage: 1.5 V, Internal Impedance: 120 to 240 mOhm, Maximum Discharge Current: 2.5 A, Terminal Type: Pressure Contact, Shelf Life: 20 years, Operating Temperature: -40 to 140 deg F, Dimensions: 0.57 in Dia x 1.98 in L, Package Type: Pack, Package Quantity: 4