Rayovac Ultra Pro Alkaline D Batteries, 8PK/CT (RAYALD12PPJCT) Case of 96Ultra Pro alkaline D batteries are specially engineered for professional use. Ideal for contract or bid business, they offer a long lasting performance and a 7 year shelf life. Reclosable container helps organize and protect these highly dependable batteries from damage and short circuiting. Stackable packaging is easy to store. Mercury free manufacturing helps minimize their environmental footprint. Application Usage: Multipurpose Battery Chemistry: