Milwaukee M12 12 Volt Lithium-Ion USB Power Source

The M12 Power Source, compatible with all M12 battery packs, features a 2.1 Amp powered USB (Universal Serial Bus) 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 fuel gauge, and is compatible with all M12 battery packs and all M12 heated gear, providing up to 6 hours of continuous heat on a single charge.