The RCHVK821M1TGL5005E from Taiyo Yuden is a Supercapacitor with Capacitance 820 µF, Voltage Rating 25 V, Equivalent Series Resistance 15 milli-ohm, Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for RCHVK821M1TGL5005E can be seen below.