Milwaukee’s M18™ Six PackSequential Charger sequentially charges up to six battery packs of any Milwaukee M18™ Lithium-Ion battery. For compact batteries, it will charge them in 30 minutes; extended capacity batteries take 60 minutes. The Six Pack Sequential Charger includes integrated hang holes if you want to mount it vertically, and a pass-through plug to conserve outlet space. Its suggested retail price is $99.