I haven't had the same experience at all, perhaps its because I'm on windows? I also don't use my camera as my audio source. I use my laptop microphone for now, with plans to get an external microphone. I just use the usb cable that came with the camera, I never had to purchase it separately.

The battery I use is one that uses the shell of a matching battery but provides a wired 8V DC through a usb SMPS, 20$ from aliexpress and I never have to worry about it.