The Milwaukee M18 Lithium-Ion AC/DC Wall and Vehicle Charger combines 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 M18 REDLITHIUM and M18 Lithium-Ion batteries. Get the status of your battery with the charger’s on-board indicator light. 2710-20