In this Chapter, we will perform an overview of the application of activated carbon solely derived from bio sources in the field of storage of electrical energy. From previous studies and literature survey, activated carbon has proven to be a very vital material renowned for its large surface area and its adsorption abilities and have a very significant role in influencing the electrical energy storage capability. In the first section of this chapter, a fundamental and foundational understanding is provided of the characteristics of activated carbon and its degree of relevance to the energy storage mechanism. A part of this chapter is also devoted to the emerging use of bio-sourced materials, including wood, coconut shells, agricultural residues, forestry waste, Aquatic waste, and many more as eco-friendly sources for activated carbon production. A comprehensive survey and review are also done on the activation processes involving both physical and chemical methods elucidating the direct influence of activation conditions on pore structure and surface properties. Characterization techniques to assess pore distribution and surface area are expounded upon, with an emphasis on the interplay between the precursor used, the activation process, and the final material attributes. Since energy storage is a vast ocean, the chapter narrows down to the realm of supercapacitors which has seen a rapid increase in research in recent decades, illustrating how bio-derived activated carbon contributes to swift charge cycle, high power density, and sustainable energy solution. Hybrid energy storage is also briefly touched, amalgamating supercapacitors and batteries which emerges as an exciting frontier delivering augmented energy and power densities for specific applications. The role of activated carbon derived from bio-sources is explored showcasing its potential enhancement of the anode performance and stability. Furthermore, the chapter also provides a glance at how bio-based activated carbon can be integrated into renewable energy systems for enhancing grid stability and efficiency. The chapter also makes an immense emphasis on environmental consideration, and existing challenges about avenues for future advancement which further advocates for sustainable practices and innovative approaches. In conclusion, this chapter will shed light on the untapped potential of activated carbon from bio-sources, in the hope that it will serve as a beacon and provide valuable insight and directions for enthusiastic researchers and practitioners in the dynamic landscape of electrical energy storage.