Kanex's lastest accessory is DoubleUp ($49), a USB charger with dual 2.1-Amp output ports. It doesn't come with cables, but by providing your own you can charge any iPhone, iPod, and most iPads at full speed; the third- and fourth-generation models will go a little more slowly than they're capable of refueling. Each port is paired with an LED indicator light that glows green when the device is fully charged.
