Energizer Industrial Alkaline D Battery offers an economical, high rate source of portable power for today's devices that require heavy current or continuous use. Each battery provides four to nine times more energy than similar-sized carbon zinc batteries. More economical than Carbon Zinc in terms of cost per hour of use on high current drains. Battery Type: Alkaline; Battery Size: D; Voltage: 1.5 V; Material(s): Alkaline Manganese Dioxide.