Get a vehicle charger that allows you to charge your car's battery on the go, but also has an auto-shut off that stops to prevent excessive discharge of the vehicle battery. The M18 and M12 Vehicle Charger allows users to charge battery packs on the go from the DC Outlet of any vehicle. It features REDLINK Intelligence that communicates directly with the battery to monitor cell voltage, temperature and charge status. This optimizes the performance and extends the life of the pack. The charger provides full system compatibility and accepts all M18 and M12 batteries.