The 20V 4.5A 90W Laptop Ac Adapter Charger is a high-quality power adapter designed specifically for Lenovo laptops. It provides fast and efficient charging with its 20V output voltage and 4.5A current. The adapter is compatible with various models including Lenovo ADLX90NCC3A, ADLX90NDC3A, ADLX90NLC3A, and ADLX90NLC2A, as well as IdeaPad Yoga 11 and 11S.