Designed to offer around half an iPhone stock battery worth of additional power while on the road, Kensington's new Mini Battery Pack and Charger for iPhone and iPod ($50) comes with a Dock Connector-equipped battery pack, a clear plastic Dock Connector cover, and a retractable USB charging cable. You plug the cable into the battery and your computer's USB port to recharge the battery, which promises to add 3 hours of iPhone talk time, or roughly…
