Next generation ultracapacitors for energy storage. Ultracapacitors (also "supercapacitors") are extremely efficient and long-life energy storage devices with a major advantage in applications requiring peak-load shaving. Ultracapacitors store 20 times less energy than batteries, but are 100 times more powerful. Switching energy capacity for higher power and efficiency means ultracapacitors are not meant to replace batteries - although they can do so in some applications - but are meant to work with them. Target applications include heavy transport, grid and industrial solutions.