A new Electronic Products article provides an overview of the advantages that ultracapacitors and combinations of ultracapacitors and fuel cells have over traditional batteries. The article touches on several applications including backup power, regenerative braking in cars, and consumer devices but much of the information could be applied to robotics as well. The author works for ultracapacitor maker, Maxwell Technologies, whose 350F D-cell sized ultracap has some interesting potential for robot builders.