Kensington Charging Dock w/ Mini Battery Pack

The Kensington Charging Dock w/ Mini Battery Pack is an iPhone 4-compatible charging dock that can simultaneously charge an iPhone and a mini battery pack that can be carried for backup power. As an upgrade from the Mini Battery Pack and Charger (2009), the Charging Dock maintains the same battery power, which can add up to 30 hours of music playback, 6 hours of video playback, and 3 hours of talk-time.

However, the incorporation of two docking ports means simultaneous charging, which wasn’t available in its predecessor. Featured also is a detachable USB charging/syncing cable, and a compact design for convenient recharging at home or in the office. One problem is that when charging via  USB-to-PC connection, the iPhone takes priority for charging and synchronization, therefore cutting off power from the battery.