It may just be an elaborate stunt to promote batteries, but it's hard not to get a little caught up in Evolta's 500-kilometer trek from Tokyo to Kyoto, which finally came to an end this week after two months on the road -- ahead of schedule, no less. Aided by a team of "Evolta Sisters," the pint-sized robot hauled a dozen AA Evolta batteries in a cart the whole way, and guided itself by following an infrared signal from a device pushed in front of it -- a few other ground rules also allowed it to be carried up stairs, and the bot didn't walk at night or in the rain. Even still, 500 kilometers is 500 kilo
