Battery Rack for the Milwaukee Packout Crate (6 batteries) - PowerRAX
Still have yet to find a better battery storage than the pre-packout stuff. A few other batteries live on tools but those are mostly 2.0's. Of course there's a few dead 9.0s
StealthMounts Packout Battery Holder Board | M18 Battery Board for Milwaukee Packout | Perfect for Transport and Storage (Milwaukee M18 w/Handle and Packout Feet) - Amazon.com
M12 Battery Holder for Milwaukee Packout Deep Organizer (Holds 1 Battery) | eBay
Milwaukee Packout M12 Battery Holder
Milwaukee PACKOUT Charging Station - Concord Carpenter
Milwaukee Packout Shop Storage 6-Piece Kit with M18 Battery Rack 48-22-8343-6PC-M18 - The Home Depot