Gomadic Intelligent Compact AC Home Wall Charger suitable for the Lenovo ThinkPad 1838 / 1839 - High output power with a convenient, foldable plug design - Uses TipExchange Technology Power Sleep"" feature reduces vampire power draw 99%. Charger will consume less than 0.1W of power when in ""dormant state"" (e.g. not connected to the Lenovo ThinkPad 1838 / 1839). Advanced state-of-the-art internal circuitry protects the Lenovo ThinkPad 1838 / 1839 from power surges, overcharging, and short-circuiting, to significantly extend the internal battery lifecycle. Gomadic Powerful High Wattage wall charger for home or travel use. Customized circuit design is based on the latest in power regulation and is tailored to the precise output voltage and resistor ID requirements of the Lenovo ThinkPad 1838 / 1839 (accurate to 0.1v!) A quality product intended to be the last home/travel charger you ever buy! This product is backed by the Gomadic Lifetime Warranty. Specification: Input Voltage (100 - 240vAC), Cable length (50 inches), Transformer Dimensions (2.0 X 1.75 inches), Foldable Adapter (Yes), Circuit Design (Lenovo ThinkPad 1838 / 1839 Specific)