Duracell D Batteries: The Duracell CopperTop D alkaline battery is designed for use in household items like remotes, flashlights, toys and more. Duracell guarantees these batteries against defects in material and workmanship; Long Lasting Power: Duracell alkaline batteries are designed and developed for long lasting performance. Guaranteed for 10 years in Storage: Duracell D alkaline batteries are guaranteed for 10 years in storage Number 1 Trusted Battery Brand: Duracell CopperTop batteries are available in Double A (AA), Triple A (AAA), C, D and 9V sizes