Pixhawk 2.1 Power Brick Mini Accuracy is all over the place

I stumbled into this, anyone ever use it? It looks as though it just needs the right connection to interface with the pixhawk…

200A continuous, 1 to 12S, hall effect current and voltage sensor.

Question, what is the battery amp offset for the standard power brick mini? It’s the only value I have not messed with to get a good calibration.