Adapters are fun. and usefull! Here is one for the Spektrum crew that also happens to use Milwaukee M18 gear.

For this project, you will need the following:

• 1x M3 screw
• 2x Male Crimp Connector (for the battery slots) the blue work fine
• 2x m3 set screws (to secure the crimp connectors in place)
• 1x mini 360 adustable buck converter or similar
• Some wire
• paperclips

I set the voltage to output on the buck converter to 5.3v to be safe. These 18 volt packes output over 20 volts which will fry your radio if you dont drop down the voltage. I added a small heatsink to my unit also to be safe. I modified some paperclips to jam into the radio battery tab ends and soldered them to my output wires with heatshrink.

There are support tabs already designed in that will need some trimming. The holes for the screws are nice and tight so I suggest tapping the holes but with a bit of effort you can use the screws themselves to tap.

Print parts as they have been layed out and in their original orientation for best quality. I made the tab a separate piece and slotted it with a screw so it can be replaced if needed without printing the entire part over again :)

I printed with ABS, so this has been scaled to account for shrink. Be warned. This may need to be adjusted for your printer/filament.

Credits to the following Makers for their original files that I used:

Ph3nyx: https://www.thingiverse.com/thing:1700124
macsboost: https://www.thingiverse.com/thing:216786