Seems a bit crazy that it's $20 but it works well and lets be honest that's the GoPro price for replacing the door. He does what he says. This allows access to the charging port while holding the battery in place. I have this door to time lapse on my Hero8 with extended battery. Exactly what I needed. It doesn't snap into place as easily as the original GoPro door (which isn't very easy either), but once in place it fits snugly and securely. Of course, this removes the waterproof component of the GoPro, but it's handy to have access to the charging port.
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