Battery Could Power World's Smallest Devices

Though many people have never heard of them, the emerging realm of micro-scale devices ? called microelectromechanical systems, or MEMS ? could completely change the medical, automotive and aerospace industries, except for one thing. No battery yet exists that will provide long-lasting power and still fit inside devices smaller than the width of a human hair. Bruce Dunn, a materials science professor from the UCLA Henry Samueli School of Engineering and Applied Science, believes a radical new design for a lightweight, rechargeable battery ? a design based on three-dimensional geometry ? will provide power to a host of devices so small that traditional batteries simply cannot be used.