Though it may seem like merely another iterative update to the company's prior iPod and iPhone batteries, Kensington's new Travel Battery Pack and Charger for iPhone ($70) is actually different, and a little smarter in some ways than its predecessors. The Travel Battery has a flip-covered Dock Connector that plugs into the bottom of an iPhone or iPod touch, permitting either device's speaker to play audio, and a flip-open USB plug at the other end…
