Why Supercapacitors instead of Batteries?

Ultracapacitors are an energy storage technology that is often compared to batteries, but the two technologies have quite different features and ideal applications. The benefits of ultracapacitors are well-established: long lifetime of about 15 years or more than 1,000,000 charge-discharge cycles, the ability to charge and discharge in seconds, high power density, and high reliability, lowering maintenance and replacement costs significantly. KERS is in many ways an ideal application for ultracapacitors, because fast charging and discharging, and the high number of charging cycles are what supercapacitors excel in.