This internal battery is compatible with Nokia E51, E81, N81, N82, 6720, and 6350 models. It is a new and high-quality battery that will give your phone a longer battery life. This is a great replacement for your old battery or a spare one to bring on trips. The battery is easy to install and will provide reliable power to your device. Get this internal battery for your Nokia phone and enjoy longer phone usage without worrying about the battery life.