Milwaukee M12 12V Lithium-Ion 4.0 Ah and 2.0 Ah Battery Packs and Charger Starter Kit (48-59-2424) - Walmart.com
Milwaukee M18 18-Volt Lithium-Ion High Output 12.0Ah Battery Pack, 12.0Ah. Battery and 8.0ah Starter Kit 48-11-1812-48-11-1812-48-59-1880 - The Home Depot
Milwaukee M18 REDLITHIUM HIGH OUTPUT XC 6.0Ah Battery Pack (2pk) 48-11-1862 from Milwaukee - Acme Tools