I wanted to add a larger capacity battery to my NanoVNA and protect it from getting damaged, so housed my device in an enclosure from Standard Supply Electronics obtained at .
It is nearly the perfect size, once you take a Dremel tool to it to remove some of the excess mounting slots and standoffs. Removed the front plate and mounted directly into the top of the case, in which I made a cutout for the display, using the NanoVNA frontplate as a template, and using the original screws (had to countersink the holes a bit to accommodate the screw heads to be flush to the surface; the enclosure was a bit thicker than the PCB frontplate). I cut up the original front plate to retain the labeling and attached the 2 label sections to the top of the enclosure. Cut slots in the sides to make holes for the USB-C, and Power and Control switches (countersink the area around the Power switch for better access). The case has a separate panel for the coax connectors to go through, it was a simple task to measure and drill these holes.
The 1000mAh battery mounted to the back of the original NanoVNA backplate using some double-stick tape. Drilled a couple holes in the original backplate to accommodate the mounting screws for the enclosure bottom (had to find some shorter screws from an old used enclosure. The screws that came with the enclosure could be used if you are skilled at cutting down screws ( I cut mine too short). The standoffs for the enclosure bottom mounting screws should be trimmed to be slightly above the surface of the NanoVNA backplate for a more secure fit of the enclosure bottom.
Overall, I was amazed at how well the it fit. Even the divide between the enclosure halves were perfectly positioned to avoid the extra work of having to mill holes for the connector and switches. If anyone would like pictures and more detailed instructions. Let me know and I will be happy to ablige.
