Apple device car chargers may have become stale over the past few years, but Just Mobile hopes to reinvigorate the category with fancier-looking designs -- and has succeeded in doing so with Highway ($35) and Highway Pro ($40). Both chargers are made from black plastic bases with silver or black diamond tread aluminum caps, and each comes with a black coiled charging cable for your iPod, iPhone, or iPad -- the basic Highway features 2.1 Amp full speed…