The self-contained power supply (SCPS) coin battery consists of a high efficiency solar panel and a power storage device all within the dimensions of a CR2032 coin cell battery. When used in battery powered devices that are exposed to ambient light, this SCPS coin battery charges itself, ensuring that you have power when you need it. The SCPS coin battery also has an RF radio to monitor its charge level along with sensors to measure acceleration, temperature and humidity. It is designed to fit into battery compartments that work with CR2032 cells without modifications.