By Lenovo.com

Lenovo 45W AC Adapter (Round Tip)

Specifications Summary: Colour: Black, Get power when and where you need it. Keep one in the office, one at home, and another in your carrying case for convenient access to power. Just plug it into an available outlet to deliver AC power to the compatible Lenovo NBs listed below and recharge the system battery. Lenovo AC adapters are compact, energy efficient and backed by a 1 year warranty. . To check if the Adapter is compatible with your system,  CLICK HERE.