Power various electronics with this 2-pack of 2850mAh AA CopperTop Alkaline Batteries from Duracell. A secure seal allows for better protection against leakage than that of many previous Duracell batteries. Built to last long, these 1.5V cells have a shelf life of up to 7 years, and will retain about 80% of their capacity after that time. Additionally, they are designed to operate reliably in extreme temperatures, and contain no added mercury.