This review highlights the progress in the development of various self-charging power packs with a supercapacitor as an energy storage system in detail. . Supercapacitors (SCs), also known as electrochemical capacitors, have been identified as a key part of solving the problem. In addition, SCs can provide solutions to charging electric vehicles much faster than is possible using lithium-ion batteries. Nevertheless, further research into. . With the introduction of novel nanostructured materials, hierarchical pore structures, hybrid devices combining these materials, and unconventional electrolytes, significant developments have been reported in the literature., pseudocapacitance) mechanisms, have strong potential to complement or even replace batteries in. . The energy conversion device (solar cells), when integrated with energy storage systems such as supercapacitors (SC) or lithium-ion batteries (LIBs), can self-charge under illumination and deliver a steady power supply whenever needed.