Genuine Lenovo G770 Slim AC Adapter ADP-90DD B
INPUT: 100-240V, 50-60Hz (for worldwide use)
OUTPUT: 20V 4.5A, 90W Connecter size:5.5mm×2.5mm , Barrel Tip (ref to the picture).
Compatible Models : IBM THINKPAD: R60, R60e,R61, T60,T60p,T61,X60, X60s,X61, Z60,Z60t,Z61 LENOVO :3000,C100,V100,N100