This charger's dual-function design offers increased utility. Whether you're in a work truck or on the work site, this charger can do the job. The M12™ Lithium-Ion AC/DC Wall and Vehicle Charger combines the functionality of a wall charger and a vehicle charger into a single unit for greater convenience and economy. The charger communicates directly with the battery pack to monitor cell voltage, temperature and charge status to quickly charge all of your M12™ REDLITHIUM™ and M12™ Lithium-Ion batteries. Get the status of your battery with the charger's onboard indicator light.