AAA and AA dummy batteries
youmagine
I'm swapping out my trusty old NiMh batteries for some high-tech rechargeable Lithium LiFePO4 cells. These new guys pack a punch at 3.2V, whereas the Nihms were stuck at 1.5V - I've got them wired up in series most of the time, so it makes sense to upgrade to two LiFePO4s with one cleverly crafted dummy battery filling out the set. That dummy battery's got a hole in it, just begging for a metal paper clip to route energy through it. I whipped up those 3D models using FreeCAD - it's an awesome open-source tool (check it out at http://www.freecadweb.org/). Once I had my designs ready, I sent 'em over to BEETHEFIRST and let them do their magic.
With this file you will be able to print AAA and AA dummy batteries with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on AAA and AA dummy batteries.