Here’s Incase’s addition to the extended battery race for the iPhone 4. It’s called the Snap Battery Case and while it might look a bit awkward in design (I’m not really a fan of it) it does sport one particular feature I like — it keeps the 30-pin connection at the bottom. So if you have one of these, at least you don’t have to carry a separate charging/syncing cord with you while on-the-go.