Panasonic DMW-BLF19E Dummy battery case

WARNING: Cheap electronics can be unreliable. I take no responsibility on the possible damage to your camera if the power supply breaks and sends overvoltage into your camera.

The 3d printed cover matches the dimensios of the DMW-BLF19E battery I measured.  It's unclear to me if it differs from  DMW-BLF19 somehow. The model does not include the clips to connect to a battery charger, as I don't see why anyone would want to make that connection. The dummy battery in the images has been successfully used with a Panasonic GH4, and according to my search results should also fit GH3 and GH5.

The model is designed to fit the common dc-dc step down converter  with the tall electrolytic capacitors (shown in the images). Smaller dc-dc converters should fit fine, but you might need to remove the two registration keys in your slicer.

The case itself is designed to be printed flat with the largest area on the print bed, while the lid is designed to be printed upright. It should be possible to use the case without the lid, but the large sidewall part that's between the input leads feels prone to breaking. And the camera locking mechanism engages this location at least in GH4, I suggest printing the lid as well.

For contacts the model uses 0.75 mm diameter component legs, bent into the J shape shown in the images.

The lid is designed to be a tight fit with 0 clearance. If it's too tight, it should be easy enough to sand a bit off one end of the lid.

‘-’ contact is soldered to the negative output of the dc-dc converter, ‘+’ is soldered to the positive output, and ‘T’ is connected to ‘-’ through a 10 kohm resistor. The last contact (labeled ‘D’ in an original battery) seems irrelevant. I assume it's only needed for charging, which obviously is not a valid use case.

Link to the onshape document: https://cad.onshape.com/documents/609d367c54c0bce13799896b/w/d9ea75ebdfa4969565e63217/e/95738d4f53cb015b0485dcbc