Duracell offers a wide range of batteries to be used in electronics that require reliable power. Duracell Plus 9V batteries are alkaline batteries ideal for powering all your devices. Duracell Plus 9V alkaline has 100% life guaranteed* (*commercial guarantee vs. the Minimum Average Duration across 2015 IEC 9V battery tests. Results may vary by device or usage pattern (IEC's website)). Unused Duracell batteries stay powered up to 5 years in ambient storage. In 1969, Duracell was part of the Apollo 11 mission and became the first battery on the moon.