Charge On The Go. The M18¿ & M12¿ Vehicle Charger allows users to charge battery packs on the go from the DC Outlet of any vehicle. The charger provides system compatibility and accepts all M18¿ and M12¿ batteries. Featuring RE’sINK¿ Intelligence, it communicates directly with the battery to monitor cell voltage, temperature, and charge status to optimize the performance and extend the life of the pack. As an added of communication, the charger has protective electronics that automatically shut down the charger to prevent excessive discharge of the vehicle battery.