Over the holidays I tried out several external battery packs for the iPhone. One of my more favorite ones is the Powermonkey Discovery. Made by Powertraveler, the Powermonkey discovery is a slim and light battery pack weighing a slight 107 grams and just 46 x 13 x 114mm in size. Inside you'll find a 3500mAh lithium polymer battery. The battery is enough to charge an iPhone two times when the Powermonkey is fully juiced.
The external casing of the Powermonkey is what really (ahem) shines, though. It's made of a polished aluminum that almost looks like a silver bar you'd find on a pirate ship. The unit has six LED lights at the top. When all are lit green, the Powerm
