After commercial production of aircraft batteries, HEB embarked upon development of Battery systems for Missiles in the year 1981. In the year 1984, pneumatically activated primary reserve battery for P Series Missiles was indigenized and supplied to Indian Navy. From then on, HEB joined hands with DRDL in the development of a host of Primary Reserve Batteries for the above application and successfully produced batteries for PRITHVI, AGNI etc. and a host of batteries have been developed and qualified as of now, including batteries for BRAHMOS.