S, M., B, M., K, A., P, P. and K, B. 2025. The Evolution of Smartphone Battery Technology: From the First Mobile Phone to Modern-Day Devices and Future Advancements. International Research Journal of Multidisciplinary Technovation. 7, 2 (Feb. 2025), 1–12. DOI:https://doi.org/10.54392/irjmt2521.