powerbank for Sony a7iii

[George]

Dear friends,

I am confused about powerbanks. 

Is it just to charge the battery in the camera or you can record video as well while a powerbank is connected to the camera.

Many people suggest the Anker Powercore 20100 but they say thats for charge. Is this for recording as well?

Or does anyone can suggest a powerbank that works with sony a7iii?

thanks

George  

[DenverSteve]

I always use an external power supply when shooting documentaries or doing any day-long video shoots. Never a problem.  You have to make sure your amperage is high enough to keep your camera from overheating.  That looks fine but I've not tested it.