The 90-Watt Ruggedized Auto Adapter from Lind Electronics can be used to power your laptop and charge the internal battery. It is ideal for use with vehicles or aircraft that have 12 to 32 VDC input power available. The adapter is housed in rugged ABS case and is sealed for resistance to moisture and shock. With features like output short circuit protection, safety current limiting, internal temperature limit cut-off circuitry, it offers reliable power. This adapter is specifically designed to work with Dell™ Inspiron™ 1720/ 1721 / Latitude™ D830 / Precision™ M4300 / Vostro™ 1700 laptops.