Two different polyoxovanadates derivatives K5MnIVV11O33.10 H2O (MnV11) and K7MnIVV13O38.18 H2O (MnV13), have been studied to evluate their electrochemical performance. These polyoxovanadates were deposited on activated carbon (AC) to prepare AC-MnV11 and AC-MnV13 composites. The electrochemical performance of the AC- MnV11 electrode exhibits the remarkable specific capacitance of 479.73 F g-1 at a current density of 0.4 A g-1, along with incredible specific power and energy of 960 W kg-1. Likewise, the AC-MnV13 exhibits a specific capacitance of 357.33 F g-1 at the same current density of 0.4 A g-1 with a specific energy of 71.46 Wh kg-1. Interestingly, the AC- MnV11 could light up the red and yellow color LED bulbs for a duration of 80 and 60 seconds, respectively, indicating a considerable specific power of the material. The AC-MnV13 electrode shows significantly less lighting up the 65 and 30 seconds period with red and yellow LED bulbs. © The Electrochemical Society