The Arizer Air II offers the ultimate versatility and control when it comes to getting the most out of your device. If user-replaceable batteries and passthrough charging weren't enough, the Air II also accommodates a car charger for easy battery saving when you're on the go. Now you can take your Air II with you wherever you are without having to worry about losing battery life. You can use it to charge your Arizer Air II in the car or as a passthrough to conserve battery life.