Sprint) Smartphone Retractable Car Charger Charge your cell phone when you're on the road. Car charger plugs into your car's cigarette lighter and charges your phone while you're driving. Use the time you spend in your car to make sure that your phone is ready to go. The innovative retractable design with quick release button cuts down on travel bulk and ensures the portability of your cell phone without sacrificing functionality. No more tangled cable mess. Intelligent IC chip recognizes a fully charged battery and automatically switches to saver mode to prevent overcharging and short circuit. Fits any devices that uses a Micro-USB Port.