Energizer MAX Alkaline Batteries, D, 4 Batteries/Pack Dependable, long-lasting performance in a wide range of devices. Makers of the world's first zero mercury AA alkaline (commercially available since 1991); battery can be disposed with regular household trash. 10-year shelf life. Battery Type: Alkaline; Battery Size: D; Voltage: 1.5 V; Material(s): Alkaline Manganese Dioxide. Long-life alkaline.