The IBM 20V 4.5A ST-C-090-20000450CT adapter laptop charger lead is a high-quality and reliable power supply for your IBM laptop. With a manufacturer warranty of 1 year, you can trust that this black adapter is compatible with IBM laptops and Lenovo IdeaPad models. The 20V voltage and 4.5A output current ensure that your device is powered efficiently and effectively, making it an essential accessory for any laptop user.