Normal shelf life is ten years & these cells are designed to be leak-proof for two years after complete discharge in order to protect valuable camera equipment. In addition to toys & devices that require relatively high current when not in constant use, Energizer Max AA cells are suitable for everyday use in various types of clocks, remote controls & some camera equipment. Industry-leading Energizer Max is the latest generation in battery power & is totally mercury-free to benefit the environment. Each cell measures 51 millimetres in height & 15 millimetres in diameter.