This product is either discontinued or we cannot get that from suppliers.
Dell 492-11688 Slim Power AC Adapter, 90-Watt, Input Voltage 120VAV or 230VAC, Maximum Output Current 4.62 A, Output Voltage 19.5 V DC, Cable Length 1m.
Stop lugging your AC adapter back and forth between home and office. Get a second AC adapter for your notebook and keep one in the office and one for home or travel.