We know what you're thinking: what could possibly be cool about a simple micro-USB charger? Well, lots of things, turns out -- and T-Mobile's latest three-pack of aftermarket chargers might just be worth the cost of admission over the standard wall wart your phone's manufacturer tossed in the box. There are three models available -- a wall charger, car charger, and 2-in-1 model that'll do both -- and all of them promise to charge your handset 20 to 50 percent faster than a standard model. What's cooler, though, is that they all feature extra USB ports in addition to the built-in micro-USB cord, allowing you to plug in and charge a second device of your choice, and the cord's never going to get too messed up thanks to an integrated spool that lets you keep everything wound up when it's not in use. If you're feeling green, take heart -- both the wall and 2-in-1 models have the best possible Energy Star rating. They're available now for between $30 and $40 online and in "select" stores, with a nationwide roll-out following on July 19. Follow the break for T-Mobile's press release.