Herein, Nickel cobalt sulfide (NCS) microspheres are successfully synthesized by an easy one-step hydrothermal method at different reaction conditions. The as-synthesized samples are used as electrode material to demonstrate their practical application for supercapacitors (SCs). Various techniques including X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), Scanning electron microscopy (SEM), Energydispersive X-ray (EDX) spectroscopy are used for structural and morphological characterization of the synthesized materials which confirmed the successful formation of NCS. The electrochemical performance of prepared samples is tested using cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The optimized NCSW-200 sample delivered a remarkable specific capacitance of 369 F g−1 at 0.5 A g−1. The energy and power density exhibited by NCSW-200 sample are as high as 32.8 Wh kg−1 and 266.6 W kg−1, respectively. After 2000 consecutive charge/discharge cycles, capacitance retention of 67% is achieved, depicting better cyclic stability. To illustrate the practical feasibility of the prepared symmetric cells of the optimized sample NCSW-200, a lab scale setup of three SC cells connected in series is fabricated and tested using a red light emitting diode (LED). The SC setup is able to illuminate a red LED for 2.5 minutes. The electrochemical performance demonstrated by NCS microspheres suggests its viable application as supercapacitor electrodes.