Duracell Coppertop batteries 9V – long lasting power guaranteed. These multi-purpose batteries are ideal for reliably powering everyday devices. Duracell Coppertop batteries give you the freedom to enjoy the use of your appliances by giving you a product you can rely on. The Duracell Coppertop batteries are best used when you are looking for reliable, long-lasting power in your every-day devices such as motorized toys, flashlights, portable games consoles, remote controls, CD players, etc. Duralock technology keeps unused Duracell batteries fresh and powered for up to 5 years in ambient storage.