M12 12-Volt Lithium-Ion Compact Battery Pack 2.0Ah and Charger Starter KitThe M12 Charger accepts all M12 batteries, so you will always be prepared and productive. The career communicated directly with the battery pack to monitor cell voltage, temperature and charge statues to ensure a full charge. Power up your compact batteries in 30 minutes and extended capacity batteries in 60 minutes, without the need for extra charges on the jobsite. The Milwaukee 48 11 2420 M12 REDLITHIUM 2. 0 provides up to 2X more run time, 20%