USB powered AA battery pack

thingiverse

AA battery pack converts to USB or other permanent connection, ditching batteries altogether. Instructions are simple - it prints without supports, tested successfully with 3mm HIPS. However, some compartments are slightly tighter, so I plan on creating a smaller modified version next. Strip a standard USB cable (or use a 3V power source if needed), you'll only require the red and black wires for this hack. I soldered these to car terminal connectors and then bent them into shape within the battery pack's framework. After some tinkering, it now successfully powers an old camera previously reliant on AA batteries - and I get to keep using my prized device forever.