1. The First Edition of the Standard for Electrochemical Capacitors, UL 810A, which covers electrochemical capacitors for use in equipment such as electronic products, uninterruptible power supplies, emergency lighting, engine starting, and power equipment. These energy storage capacitors, also known as "electric double layer capacitors" , "ultracapacitors", "double layer capacitors", or "supercapacitors"; consist of either individual capacitors or multiple series and/or parallel connected capacitors with or without associated circuitry.