Smarter than it might initially appear, Kensington's new PowerLift ($50) evolves the common iPhone battery with a couple of smart twists. Though it can be attached to the bottom of any iPhone or Dock Connector-equipped iPod and used that way, the plastic body flips open to become an iPhone-supporting dock, complete with an integrated USB cable and a battery power indicator button built into its bottom. The short USB cable length is apparently designed…
