A few months ago, Microsoft announced the DC-21, a portable power unit that is capable of charging your USB devices. The charger comes in three different colors and costs $49.99 from the Microsoft store.
The device comes in white (above), orange and green and the box also comes with a matching mini USB cable for charging. To charge the device you use the micro-USB connector and connect it to a power source but it should be noted that the device does not come with an outlet connector. To charge up your phone or any other device, you use the full size USB port on the bottom of the DC-21.
On the top of of the device are four LED dots that tell you the current charge of the battery. By pressing down on the single button on top, the lights turn on to let you know the charge-level of the DC-21.
The capacity for the power pack is 6000 mAh which is generally enough to charge your phone a couple of times or to power up a larger device, once.
The device is made of plastic, to no surprise, but does have a quality feel to it. This likely comes from the heft of the device as the batteries make it weigh 145g (about 5 ounces). If this portable charger sounds like something you want to buy, you can grab it from the Microsoft store here.