A REVIEW ON GRAVITY BATTERIES - Supraja, V.; Chandh, K. Sri Sai Ram; Nagendra, S. Sasi; Chandu, A. Swami; Teja, P. Sai; Sastry, R. Raghunadha; Rao, Dr. N. Sambasiva (International Journal of Advance Research and Innovative Ideas In Education, 2022)