AA Battery pack holder with slots for contacts and wire holes

Openscad code for this and other battery holders is available on github:
https://github.com/adgaudio/3dPrinter/blob/master/random_parts/battery_holder.scad

Can be wired in series or parallel, or even just used to store 4 AA batteries together. The contacts fit in a slot that can extend to 2 batteries :)

There is a nut trap through the center designed to fit m3 bolts and nuts, if you'd like to secure the batteries onto the contacts.