The Milwaukee PACKOUT Tool Box M18 Battery Rack Attachment is a storage attachment for PACKOUT tool boxes that keeps M18 batteries mounted on the outside of your stack for faster access on the job. This is a battery rack attachment designed for M18 battery storage and quick battery access. Model Number: 48-22-8603. If you already run Milwaukee cordless tools and keep spare batteries in your PACKOUT setup, this attachment solves a simple but real problem: wasted time digging around inside the box every time you need a fresh battery.

What makes this piece useful is how straightforward it is. The rack stores 3 M18 batteries in clip-in slots, so your packs stay organized, visible, and easy to grab. On a busy jobsite, that means less opening and closing boxes and less chance of tossing batteries in with hand tools, fasteners, or blades where they get buried or banged around. For crews already moving between tasks with drills, impact drivers, lights, saws, or nailers on the M18 platform, that convenience adds up fast.

Milwaukee built this accessory around the PACKOUT system instead of treating it like a generic organizer. It is designed to securely lock onto PACKOUT tool box metal-reinforced corners, and it can be connected or swapped out with the included mounts. That matters because modular storage only works when accessories install cleanly and stay put. If you use your stack in a van, trailer, or around a punch list site, a properly mounted battery rack is a lot better than a loose battery caddy sliding around in the box.

The body is made from VO PC ABS and Milwaukee calls out an impact-resistant body. In plain terms, this is built for the same rough handling your PACKOUT boxes already see. It is not just about surviving a drop. It is about dealing with repeated loading, unloading, jobsite bumps, and the general abuse storage gear takes when it lives in the real world instead of on a shop shelf.

Size is part of the appeal too. At roughly 16.8 inches long, 3.3 inches wide, 5.2 inches high, and about 0.95 lbs, it adds battery storage without turning the box into something bulky or awkward. That makes it a smart fit for users who want better organization but do not want to give up interior box space for batteries they need to access all day.

This Milwaukee battery rack attachment makes the most sense for contractors, service techs, remodelers, electricians, plumbers, and serious DIY users who are already invested in both Milwaukee M18 tools and the PACKOUT modular storage system. If you do not use PACKOUT tool boxes with metal-reinforced corners, this is obviously not the right accessory. But if you do, it is the kind of upgrade that makes your setup more practical every time you roll onto a site.

Milwaukee PACKOUT Tool Box M18 Battery Rack Attachment Is a Smart Little Upgrade

This is the kind of accessory that seems simple until you use it for a week and realize you do not want to go back.

• Who it's for: Milwaukee M18 users who already run PACKOUT tool boxes and want faster battery swaps on the job.
• Why it stands out: It keeps three batteries outside the box, uses PACKOUT mounting hardware, and adds function without eating up interior storage space.
• Worth knowing: This is a system-specific accessory, so it makes the most sense if your tool box has PACKOUT metal-reinforced corners and you are already committed to M18 batteries.

• How many batteries does it hold? It stores up to 3 Milwaukee M18 batteries.
• What does it attach to? It is designed to lock onto PACKOUT tool boxes with metal-reinforced corners.
• Is this part of the M18 system or the PACKOUT system? It connects both: it stores M18 batteries and mounts to the PACKOUT modular storage system.
• What is the body made from? The rack uses VO PC ABS material for impact resistance and durability.