HQRP AC Power Adapter for IBM Thinkpad A20 A21 A22 A30 A31 R30 R31 R40 R41 R50 R51 R52 T20 T21 T22 T23 T30 T40 T41 T42 T43 X20 X21 X22 X23 X30 X40 Laptop + Coaster HQRP&reg; Laptop AC Adapter with Power Cord plus HQRP&reg; Coaster; Power Consumption: 72 Watts; Frequency: 50/60Hz; * Safety Features: High Efficiency and Reliability; Automatic Overload cut-off; Input: 100 240 Volts; Output 16 Volts, 4.5 Amps; 200 days warranty!