Figured I would share some info on external chargers for the NC. I purchased the CLEARMAX CM-500 5000mAh External Battery pack off of Amazon for $29.99+shipping and it works like a champ. The discharge rate of the device is about 600mA so it's sloooow and will not register the little battery lightening bolt but does charge the unit at about the same rate as a standard usb port. If you travel a lot, or are going to be away from a plug for an extended period of time, like flying to Japan from Atlanta, or just happen to get stranded in an airport for a half a day, it gives you some handy options. The battery easily charges the NC from 0 to 100% with enough juice remaining to charge my iPhone 0 to hero along with charging my bluetooth headset. So, if you are concerned, give this a look, it's a good solution for me!
Battery Specs.
Input - 5V/100mA
Output - 5V/600mA
Capacity - 5000mA@3.7V
DuBB
Battery Specs.
Input - 5V/100mA
Output - 5V/600mA
Capacity - 5000mA@3.7V
DuBB