Mount for the Ryobi Small OP404VNM 40V battery
You'll need 4 - M3 5mm screws for assembly.
Battery locks in the mount, so this can be mounted in any orientation.
Make sure you have the correct charger to fit this mount. There are at least 2 different chargers that share this model number. Every other wall mount I found was for the larger version. This one measures appx 81mm x 83mm at it's widest dimensions.
If you know an easy and inexpensive way to channel the light from the charging indicator to a place where it's visible when this is wall mounted, please share it in a comment and I'll see if I can add that feature to the base.