Power-up your device with these Energizer Industrial Alkaline D Batteries. They offer an economical solution for devices that require heavy current or continuous use. Each battery provides four to nine times more energy than similar-sized carbon zinc batteries. These Energizer D batteries will work ideally with flashlights tools and toys. Made of durable mercury-free materials they are each date-coded and rated with a long 7-year shelf life. This package includes a box of 12 Energizer industrial batteries.