The latest version of XtremeMac's InCharge Auto car charger is called InCharge Auto for iPad ($25), adding 2.1-Amp charging capabilities to a previously iPod- and iPhone-only charging design. Featuring a single straight power cable rather than the coiled ones that have appeared in some past XtremeMac car chargers, the new InCharge Auto is made with black and gray plastics, features a small, slim Dock Connector, and has a LED power indicator and safety…