The Gadget: iV iPhone case and battery, which adds 4x as much battery time to the iPhone while not adding too much more bulk.
The Verdict: The rubberized plastic feels nice, the LED flash/flashlight on the back is good for finding your keys or taking low-light pictures and it clips neatly onto your belt if you're one of those belt dudes. There's also a USB port on the back for charging another device while your iPhone is being charged/docked. $79. [Fastmac]