Lenovo 170 Watt Slim Tip AC Adapter FRU 4X20E50574 Includes 2 Pin Power Cord Slim Tip 170w AC Adapter With 2 Pin Power Cord Included ( Lenovo MFG P/N; 4X20E50574) Black Only used In Lenovo ThinkPad With Slim Tip Enabled Connection Not Used In Round / Barrel Connection Type Thinkpads