Has anyone attempted to modify a GoPro MAX so that the battery door can be closed but the camera can still be plugged in to charge? That is, drill a hole in the battery door over where the USB-C port is. I am fully aware that such a modification would compromise water resistance! I have a couple of Sony FDR action cameras that will capture on interval all day and then some when an external battery pack is attached. For those cameras, the cable ports are a covered by a separate flap than the door for the battery and memory card. I would love to be able to capture for longer periods with the GoPro MAX without having to purchase additional GoPro batteries and swap them out as they drain.
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I run multiple GoPros without the battery doors on and connected to USB power under the car bonnet. Obviously if it starts raining then I cease capture. I see that there are some doors available (at the usual GoPro price!) but not sure if they also fit the MAX
https://gopro.com/en/au/shop/mounts-accessories/usb-pass-through-door/AFCOD-001.html
It didn’t even cross my mind to search for that but sure enough that is a thing - there are definitely options for the GoPro MAX. 
Thank you @tastrax! I think buying something will work much better than breaking out the drill 
Happen to find anything?
I found one for $30 on Amazon.
https://www.amazon.com/dp/B0C4MM4KM8/
But it is the same price as an OEM door, which has a lock, and would likely work pretty well with a hole drilled in it.
https://gopro.com/en/au/shop/mounts-accessories/max-replacement-door/ACIOD-001.html
I’m also looking at 90 degree USB-C adapters. Something like this.
https://www.amazon.com/dp/B0BG71BM9N/
I don’t have a 3D printer but this looks promising:
I ended up buying one for $16 on Amazon: https://www.amazon.com/gp/product/B0CBTZZS45/
installed on my camera:
screenshot of the listing in case the URL changes:
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