For a safe, long-lasting battery that just keeps performing, you cannot do better than Duracell Plus. The new and improved Duracell Plus D are alkaline batteries with 100% Life Guaranteed (Commercial guarantee vs. the Minimum Average Duration across 2015 IEC D-size battery tests). Ideal for powering everyday devices, such as torches, lanterns, home alarms, etc. Unused batteries last up to 10 years in ambient storage. 98% of our paper-based packs are made from recycled materials.