Revamped from the company's highly similar product TuneJuice 2 for iPods, TuneJuice for iPhone ($30) is now both iPod- and iPhone-certified, and uses USB charging rather than FireWire for full compatibility with the latest USB-only iPod and iPhone models. Roughly 2/3 the size of an old iPod mini, TuneJuice has a soft touch rubber body, a four AAA battery compartment, and the ability to power an iPhone for roughly 2 hours of talk time or 1.5 hours…
