e-TRNL Energy is an Indian start-up company in the energy storage space. Founded by experienced technologists from IIT Bombay and IIT Roorkee, e-TRNL Energy is working on a fundamental battery cell technology that is chemistry agnostic and can adopt all present Li-ion and future Na-ion chemistries. The technology offers battery cells with higher energy density and lower heating compared to its peers, with better pricing economics.