Hero 3 Black Power Draw?
I want to power my Hero 3 Black with an external power source. It's being carried on a quadcopter and I'd like to power it off of the onboard 5200mah 3s lipo battery. I've typically used a Polulu 5v/600ma step-down regulator to power the GoPro and that has worked fine all the way up to my GoPro Hero 3 White. To be clear, I do not mean trickle charging but actually powering the camera during recording with no battery inside. It does not work with the Hero 3 Black. I can't even turn the camera on like this much less record.
So I'm wondering what the amp draw is for the Hero 3 Black while it is recording at the highest settings? And can it powered through its USB port? I tend to think yes to that second question.
I've searched quite a bit for the power draw of the Hero 3 Black and the best info I could find was this power chart suggesting 2.6 watts for the H3B when recording. If so, at 5v, that would imply something like 0.52A or 520ma. Does this sound right?
What I'm thinking of trying is using a 5v/1A polulu stepdown and seeing if that works. I knew the H3B was a power hog before I bought it but I can't imagine it would draw more than 1A, right??
Thank you for any feedback.