Duracell Coppertop Battery D 2 pk. MN1300B2Z. These Batteries from the fine people at Duracell are engineered to deliver all the power you need for a wide variety of devices. Plus with Duralock Power Preserve technology for a guaranteed 10 years of storage without losing power. Duracell D Coppertop Batteries feature an A.B.C. of zinc giving them the power to last. And with Duralock Power Preserve technology they can even be stored for a period of time without losing their power making them excellent for long term storage of Duracell products. You can be sure that your favorite products will work just fine with the Duracell D Coppertop Batteries. Specifications for Duracell Coppertop Battery - D: Manufacturer: Duracell Battery Type: D Package Contents: Duracell Coppertop Battery - D Provides dependable long-lasting power. Engineered to deliver all the power you need for a wide variety of devices. Duralock Power Preserve technology for a guaranteed 10 years of storage without losing power.