Energizer Alkaline Power AAA Batteries, Pack of 4. These batteries provide lasting power for basic energy needs and have great resistance to leakage. They are mercury and cadmium free and have a 7-year shelf life when stored at 21°C. Each battery has a voltage of 1.5V, an external diameter of 10.5mm and a height of 44.5mm. Ideal for use in wireless gaming controllers, Bluetooth headsets, cameras, torches, remotes, portable gaming devices, walkie-talkies, GPS units, toy cars, clocks, and baby monitors.