Any ideas on waterproofing a USB port?

Builds / Use Cases
1

I’m wanting to do a build based on this

but I would like to expose the USB port and optionally the buttons. Does anyone have any suggestions on how to create a waterproof USB port like new smartphones have?

2

If its just for charging, have you considered a micro usb QI charging pad?

i’ve taken them apart to just expose the receiving coil.

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3

You might try something like this. They appear a little overpriced, but are available from China cheaper, if you have the time.
Waterproof Micro USB Port

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4

Yes, I saw those as well. Those would be great for a stationary node, wasnt sure about something small for in a backpack.