Lind automobile adapters operate your laptop and at the same time charge the laptop's internal battery. Each adapter provides the proper voltage for your specific computer. Output filtering, tight regulation and short circuit protection keep your computer safe from power fluctuations at the source. All adapters operate from an automobile's cigarette lighter. A quality design and rugged enclosure ensure your complete satisfaction.This adapter is designed for Panasonic Pentium 4 CF48 and CF72 series computers.