A car charger adapter is important for achieving electrical power from a vehicle to power on or recharge other portable devices, like FM transmitter, car MP3 player and mobile telephone. Therefore, if the original one is malfunctioned, you should replace it by a new one and this is charger would be your best choice. Don't be stuck with a dead battery while you're out. Our Dual Bullet 2 Port car charger turns a cigarette lighter jack into a powered USB port. Easily and quickly recharge your portable devices, like cell phones, MP3 players, iPods/iPad, or other USB powered devices. Use your existing USB charge/sync cable for charging. This adapter plugs into your car's cigarette lighter jack to become a powered USB port. Use your car to charge any devices (digital cameras, PDAs, mobile phones, USB accessories and more) that rely on USB for power! Mini size and streamlined design.