When connected to the 12W adapter, iOS refers to it as a 12W “USB brick” (12W = 2.4A x 5V). With that charger and the screen turned off, iOS reports an average gain of 1680 mA, which, considering that ...

He put together a charger for his new iPod nano er, shuffle. It’s sort of in two parts: a USB to mini-jack and a 5v wall adapter to USB port.