The M0810-2R5105-R from Eaton is a Supercapacitor with Capacitance 1000 mF, Voltage Rating 2.5 to 3.0 V, Equivalent Series Resistance 210 to 250 mOhms, Temperature Operating Range -40 to 60 Degree C. Tags: Through Hole. More details for M0810-2R5105-R can be seen below.