The GW209F is a supercapacitor cell manufactured by Cap-XX. It is a 2.85V, 520 Farad device, which is designed for use with high cell voltage applications, such as backup power, peak power assist, and short-term energy storage. The GW series are Cap-XX's most advanced and highest energy density supercapacitor. These cells are designed with high capacity, low ESR for high power delivery, excellent cycling performance and fast charge/discharge capability. They also feature lower leakage current and temperature sensitivity, making them suitable for applications requiring reliability and long lifespan.