In an advertising campaign, Matsushita Electric Industrial Co Ltd, the maker of Panasonic products, created a blue 134 gram (5 ounce) robot that scaled a rope up the Grand Canyon. The robot ran on just two AA Evolta batteries, trying to demonstrate that the EVOLTAs are the longest lasting batteries. Unfortunately, the weather was poor and the robot is not waterproof, so they had to attempt several times before finally succeeding in scaling the 530 meters in 6 hours and 46 minutes. There is a video of the brave little robot.