DC-32 is a portable charger from Microsoft that lets you charge two devices at the same time. It supports fast charging so you can charge your Lumia windows phone as if you are using a wall charger.
There are four LED lights on the top that indicate how much charge is left in the DC-32 Microsoft Portable Dual Charger. It can store the charge for long periods. Microsoft claims that you will still have 80 percent charge if you leave it in the drawer or bag for several months. From a meter distance, anyone can mistake it as a portable hard disk or Western Digital Passport. It measures 100 x 50 x 25 mm (width x height x thickness) and weighs 141 grams. Its bigger brothers DC-33 and DC-34 have following dimensions.
DC-33: 100 x 68.5 x 25 mm; 215 grams
DC-34: 100 x 87 x 25 mm; 275 grams.
DC-32 Microsoft Portable Dual Charger Review: Unboxing Video by Lumia blog
It has two standard USB ports so you can charge any type of device that supports USB charging. This means you can charge your iPhone, iPad or Android tablet too. Just make sure you have their cable with you. DC-32 battery capacity is 5200 mAh.
On the other hand, DC-33 can store 9000 mAh which is more than enough to charge a phone like Lumia 640 four times and still have some juice left. DC-34 which is the biggest of all has 12000 mAh. All three are charged using their micro USB ports. Maximum output current is 2100 mA for all three models.