The CAP ALUM POLY 820UF capacitor is a type of electrolytic capacitor with a radial lead configuration and a polymer case. It has an 820 microfarad capacitance and a voltage rating of 2.5 volts. The capacitor is made from aluminum with a polymer electrolyte, allowing for high reliability and long lifespan. It features a low leakage current of 7 milliohms and can withstand temperatures up to 105 degrees Celsius, making it suitable for applications requiring high heat resistance. The product has an expected lifespan of 5000 hours at maximum operating temperature.