Rocket Unlimited Power: The most popular series of ROCKET Batteries; The ES & ESC series has been performing with a proven track record for more than 52 years. It has successfully exemplified its quality and reliability in some of the most demanding power conditions by providing un-relentless backup power supply. With the same characteristics as that of the ES series, the ESC series provides power reliability to applications which require longer backup time. This series is widely used in UPS as well as Telecommunication Applications in many parts of the world. The ESC series is world-renowned and recognized as a highly reliable Battery System in the industry.