There are other wall mounts for 40v batteries out there, but they're all huge and take too long to print and too much filament. I made this one just to print in not a long time and be low profile. Each holder can be mounted to the wall with 2 regular deck or drywall screws. The holders are slightly angled to make removing and replacing the batteries easier. I've been using these in my garage for 6 months and they have held up well this far. Print them with at least 6 or 7 walls for best performance.