Brand‎GenericModel Name‎LENOVO IBM 20V – 4.5AItem part number‎IM09000Compatible Devices‎LaptopsSpecial Features‎Short Circuit Protection, Fast ChargingPin Size‎7.9*5.5mmNumber of items‎1Wattage‎90 WattsPower Source‎Corded ElectricNumber of Ports‎1Weight‎350 gWarranty‎06 MonthsCompatible Models :Adapter Charger For IBM LenovoThinkPad T61 7661IBM Lenovo ThinkPad T61 7661-11UIBM Lenovo ThinkPad T61 7661-12UIBM Lenovo ThinkPad T61 7661-1NUIBM Lenovo ThinkPad T61 7661-1PUIBM Lenovo ThinkPad T61 7661-2BUIBM Lenovo ThinkPad T61 7661-2SUIBM Lenovo ThinkPad T61 7661-XAUThinkPad T61 7662IBM Lenovo ThinkPad T61 7662-CTOThinkPad T61 7663IBM Lenovo ThinkPad T61 7663-01UIBM Lenovo ThinkPad T61 7663-02UIBM Lenovo ThinkPad T61 7663-03UIBM Lenovo ThinkPad T61 7663-04UIBM Lenovo ThinkPad T61 7663-11UIBM Lenovo ThinkPad T61 7663-12UIBM Lenovo ThinkPad T61 7663-13UIBM Lenovo ThinkPad T61 7663-16UIBM Lenovo ThinkPad T61 7663-1TUIBM Lenovo ThinkPad T61 7663-2DUIBM Lenovo ThinkPad T61 7663-2EUIBM Lenovo ThinkPad T61 7663-2EVIBM Lenovo ThinkPad T61 7663-3FUIBM Lenovo ThinkPad T61 7663-3JUIBM Lenovo ThinkPad T61 7663-3LUIBM Lenovo ThinkPad T61 7663-3SUIBM Lenovo ThinkPad T61 7663-A82IBM Lenovo ThinkPad T61 7663-AK5IBM Lenovo ThinkPad T61 7663-CTOIBM Lenovo ThinkPad T61 7663-E47ThinkPad T61 7664IBM Lenovo ThinkPad T61 7664-04UIBM Lenovo ThinkPad T61 7664-05UIBM Lenovo ThinkPad T61 7664-06UIBM Lenovo ThinkPad T61 7664-16UIBM Lenovo ThinkPad T61 7664-17UIBM Lenovo ThinkPad T61 7664-19GIBM Lenovo ThinkPad T61 7664-1JUIBM Lenovo ThinkPad T61 7664-1KUIBM Lenovo ThinkPad T61 7664-1LUIBM Lenovo ThinkPad T61 7664-1MUIBM Lenovo ThinkPad T61 7664-R7UIBM Lenovo ThinkPad T61 7664-R8UIBM Lenovo ThinkPad T61 7664-RWUIBM Lenovo ThinkPad T61 7664-RYUIBM Lenovo ThinkPad T61 7665IBM Lenovo ThinkPad T61 7665-11UIBM Lenovo ThinkPad T61 7665-12UIBM Lenovo ThinkPad T61 7665-13UIBM Lenovo ThinkPad T61 7665-1TUIBM Lenovo ThinkPad T61 7665-2DUIBM Lenovo ThinkPad T61 7665-2JUIBM Lenovo ThinkPad T61 7665-3EVIf your laptop model is not listed here, kindly match with the output rating & output pin type from your old ac adapter, as given above. If it is same, you may buy this adapter