Dell Latitude E5250 E5450 E5550 E7450 3550 AC Laptop Notebook Charger Adapter 65 W Output Power 120 V AC, 230 V AC Input Voltage 19.5 V DC Output Voltage 3.34 A Output Current for Inspiron 15 (3521), Inspiron 15 (7537),Inspiron 15R (5520),Inspiron 15R (5521),Inspiron 15R (5537),Inspiron 15R (7520),Inspiron 15z (1570),Inspiron 15z (5523), 100% compatible with P/N: M1P9J, 332-1831, 04H6NV, 4H6NV, PA-12