Yes. If you're powering the camera from an external source via the USB-C cable, you can remove the internal battery and run the camera via external power. The camera will continue to work normally.
An advantage of leaving the internal battery in place is as a safety net in case the external power stops flowing. Without the internal battery, the moment that the AC power stops, the camera will turn off. It won't turn back on automatically when the power source is restored. With the internal battery installed, it will switch over seamlessly. But there are times where removing the battery might be a better option, especially for very long-term shooting such as timelapse.
External Power Indicator
Usually, when you connect external power you'll get the charging battery indicator. Without any internal battery to charge, though, there's a different icon on the front screen. It looks like this:
James says
Can a gopro (any model) be set to turn on when USB power is applied (assuming battery is not installed)?
Can the newer models be set to automatically connect to wifi upon powering on?
David says
Not as far as I'm aware--at least, not without something like the hacked firmware that CamDo uses for their time-lapse setups on the HERO4 models. I don't recall that particular firmware script providing that functionality--I'm just pointing to it as an indicator that it is possible to trigger the power on/off system externally.
You can have the cameras ready to receive the wifi connection, but the connection is initiated and controlled on the phone or computer side of things. By default, the camera can't itself connect to a wifi network or router. I've heard of people trying to jury rig setups with routers running DD-WRT or using a Raspberry Pi, but I don't know how successful it is or what's possible with them.
Annie says
Hi there,
Can you recommend an external power cable to plug the Hero6 into mains power?
Thank you!
David says
A USB-C cable with any standard USB wall charger should work just fine to power it and charge at standard speed. If you're looking to take advantage of fast charging, you'll need a higher-output USB-C charger like GoPro's Supercharger. You can find more options here. (That post is focused on the HERO5 models, but it applies equally to the HERO6.)