Lenovo ThinkPad Slim Tip Power Supply AC Adapter is the perfect replacement for your laptop's power source. It is specially designed for Lenovo laptops and has a maximum output power of 230W and an output voltage of 20V. This adapter comes with a power cable and a 4 prong adapter is not required. It is compatible with Lenovo ThinkPad laptops and has an output current of 11.5A. This package includes one AC adapter and is ideal for those who require a high voltage power source for their laptops.