Xtrememac has just revealed a trifecta of USB chargers, all of which seem to boast subtle changes from the norm that piqued our interest. First off, the universal dual USB wall charger has not one, but two USB charging ports, delivering a full ten watts of power (read: enough for the iPad) to a pair of your favorite gizmos. Moving on, there's the universal USB car charger, which sadly doesn't sport two USB ports. The universal USB battery pack and wall charger looks mighty similar to the PowerPak XT, doubling as a USB wall charger as well as a portable battery pack when it's unplugged. As for pricing? Try $14.99, $24.99 and $59.99 in order of mention, with the whole lot being available now directly from the company.