ATTENTION!!
The print profile uploaded by tundra3866cda are oriented upside down. They have been made aware of this, and have not changed it.
This is the correct orientation:

 

Will securely hold your M18's wherever you need them most.

I've made four versions.

All of them will lock/clip the battery in place with the tabs.
All of them should be printed with the face that you put the battery into, downwards.

The normal:
-Plenty of clearance for fingers, when mounted flush against another mount.
-Allows a decent amount of visibility when mounted beneath a shelf.
-Leaves the option for adding something like a dymo-label, in a readable angle.

The Long:
-Plenty of clearance for fingers, when mounted flush against another mount.
-Can be mounted in corners, such as under a shelf, flush against a wall, and still leave room for the battery.

The Tilt:
-Plenty of clearance for fingers, when mounted flush against another mount.
-Makes it possible to mount closer to other mounts in a vertical arrangement.

The Slim: (Essentially just the the bottom off the normal)
-Really for whatever. Just wanted to leave it as an option.
-Saves about a centimeter in height, might need to be mounted against an outer edge, allowing for clearance to the tabs on the battery.