e-TRNL Energy is redesigning the battery cell itself rather than its chemistry
The Bengaluru-based company has developed a cell architecture that it says works with lithium and sodium chemistries alike and has built the machinery to manufacture it.
e-TRNL Energy, a Bengaluru-based battery cell technology startup founded in 2021 by Apoorv Shaligram and Uttam Kumar Sen, is revolutionizing the industry by focusing on redesigning the battery cell itself, rather than merely altering its chemistry. The company, which has raised a total of ₹34.9 crore (including a ₹27.4 crore seed round in February 2026 and a ₹7.5 crore pre-seed round in 2022), claims its innovative cell architecture is chemistry-agnostic, meaning it can work with current lithium-ion chemistries and emerging sodium-ion chemistries.
According to e-TRNL Energy, its redesigned cell architecture leads to lower heat generation, faster charging, extended cycle life, higher energy density, and improved manufacturing economics. The company has reportedly obtained two patents and filed additional applications for its novel cell design. To achieve this breakthrough, e-TRNL Energy has invested in developing its own manufacturing equipment, as standard production machinery is incompatible with the new cell design.
With a 20,000 sq ft research and early manufacturing facility in Bengaluru, e-TRNL Energy is committed to a full-stack approach, encompassing cell design, manufacturing technology, and machinery development. The company's in-house engineers have designed and developed all production equipment, from concept to full automation, to ensure seamless production and optimal performance of the redesigned battery cells.
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