Hrmm.. Nissan, and possibly another automaker, plan on releasing a luxury hybrid with lithium-ion batteries around the end of 2011. Although with the spate of issues inherent with the technology (production difficulties, contamination, heat) I wonder how they plan to address them; problems with laptops are one thing. Who know what issues could develop with these transparent batteries once you start to layer them, or increase their mass, etc.
Better off to stick with more
natural power sources.