On Thursday, my friend and I arrived at Mac World with two dead cell phone batteries. We assumed correctly that there would be wireless connectivity and charging stations in the exhibits. I stumbled upon Solio. While my phone was charging, I looked at a number of models of multi-device chargers. Apparently, you can charge your charger with energy from the sun or the wall -- it's a hybrid. The Solio H1000 has a clip on one end that would make it easy to wear on a hike or a bike. Handy for emergencies and disaster preparedness. A cool tool.