Samsung Galaxy S2 Mobile Smartphone (Tangle Free) Retractable Car Charger 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. Car charger plugs into your car's cigarette lighter and charges your phone while you're driving. Intelligent IC chip recognizes a fully charged battery and automatically switches to saver mode to prevent overcharging and short circuit. Plug never heats or overcharges the battery.