There are a ton of external battery packs for iPhones and iPads. I remember the good old days when it seemed like the only packs available were little blobs that you'd plug into the bottom of an iPhone to keep it going for a few more hours. Now everybody and their brother-in-law has an external battery pack in their line, so it's nice to see one that's completely different from the rest of the pack. It's the Exogear Exovolt Plus, which has the distinction of being a stackable battery pack. Read on -- we're going to give away some goodies to one lucky TUAW reader.
Design and Functionality
The Exovolt Plus comes in two models: the main battery (US$89.95) and sub batteries (US$49.95 each). To power yo
