Rectangular mounting box for use in generic PLA project boxes. I hot glued mine in. Intended for use with the LiPo battery included in the SunFounder ESP32 starter kit, though the size is likely standard. Box includes a half open face to expose battery's wire harness. Screw hole is sized for #4-40 machine screw (2.8 mm) but tapers inward, so screws down to 2.5mm will likely work as well. 

Single color, no supports

Printed in ~45 min on a P1S using PLA

Internal dimensions are 23x23x65mm (not including chamfers)

External dimensions are 27x27x83mm (2mm exterior walls)

Tested using generic PLA, though PETG is likely preferred

• Did I chamfer the bottom so the first layer would look better? 
  • No, I forgot
• Would it be stronger if the 4th wall was on the base instead of the lid? 
  • Probably
• Do you need a license to use this? 
  • Nope, made this in about half an hour for a related project. Build it, sell it. Heck I'll give you the f3d file if you want to mess around with it