John Kim, the director of industrial and utilities systems at EnerSys, gave an engaging presentation on electrical substation battery systems on April 29, 2024 to the IEEE Vehicular Technology Society Philadelphia Chapter. Mr. Kim presented the history of substation batteries and today’s latest technology. Battery systems in substations are used to provide backup power for switchyard equipment, protective relays, and control systems. We thank Mr. Kim for taking his time to prepare informative slides full of technical information and graphics. The complete presentation is available on our website.