The M12 Power Source is compatible with allMilwauke M12 Battery Packs. Featuring a 2.1 amp powered USB port that charges tablets, smart phones, mp3 players, and other portable electronic devices. This smart-charge port identifies the electronic device being charged; delivering fast, safe charging. The adapter features an on-board power guage, and is compatible with all M12 Heated Gear. (Battery sold separately). 49242310 49-24-2310