The HP-2R7-J507UCJ59 from Jinzhou Kaimei Power is a Supercapacitor with Capacitance 500000 mF, Voltage Rating 2.7 V, Equivalent Series Resistance 2.5 mOhms, Temperature Operating Range -40 to 70 Degree C. Tags: Through Hole. More details for HP-2R7-J507UCJ59 can be seen below.