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• CuO nanobeads was synthesized by simple Co-precipitation method. • CV and GCD analysis confirms the faradic nature of synthesized material. • A high value of specific capacity 69.1 mA hg−1 (771 Fg−1). • Capacitance retention of 82.1% was achieved up to 1000 cycles. Here we report, a simple co-precipitation method for the synthesis of copper oxide (CuO) nanobeads. Many characterization techniques such as Powder X-ray diffraction (P-XRD), Field Emission Scanning Electron Microscope (FESEM) and Fourier Transform Infrared Spectroscopy (FTIR) confirms the purity of CuO nanostructure while electrochemical studies exhibit a specific capacity of 69.1 mA hg−1 (771 Fg−1) at 0.83 Ag−1 current density which is higher than other reported bare CuO nanostructure. Furthermore capacity retention of 82.1% over 1000 charge/discharge cycles and low value of charge transfer resistance (R ct) confirms its potential to be used as an electrode material for energy storage devices. [ABSTRACT FROM AUTHOR]