Anker has their dual-port USB car charger on sale today, it's actually on sale for $23.99 which is about 20% off the normal price, but there is also a coupon code to get another $4 off. If you use Coupon code ANKCI4OF you'll get it for $19.99. Which is a pretty good price on a car charger that you can use with virtually any device since it's USB and not just a microUSB charger.
This dual-port USB car charger can charge an iPhone and Android phone at the same time, or two tablets or even two HP Chromebook 11's, although that'd take an awfully long time to charge up. The output is 2.4A max, for both outlets, for those interested. Anker does say that it will provide the maximum charge speed to devices for uninterrupted performance of navigation and media streaming utilities. It is also smaller than most car chargers and is also without LEDs so it doesn't distract you while your driving.
It's a great gift for anyone, and definitely one of the "must have" items for any tech geek out there, especially one that travels a lot. you can grab it from the link down below.