How I stay charged, connected at CES

Jefferson Graham and his camera walks you through the busy, ultra-crowded booths in the CES Central Hall. The high-tech show is notorious for making it hard to get online and draining batteries. LAS VEGAS--CES teaches hard lessons about preserving a phone, tablet or laptop's battery life and connectivity, starting with this: If you value those things, don't go to CES. Having 175,000-plus people swarm around the city while constantly on e-mail, the Web, navigation apps and social networks will crumple wireless networks and leave batteries in the red. Getting through all this takes advance preparation--the kind that can also help you get through lesser battery and bandwidth challenges.