Help Please

Hi, sorry for my bad english. I have two question. I have pixhawk, 10.000mah multistar 6s lipo and Attopilot 180A. I can not correct percantage battery remaining on mission planner while I am testing at home. Battery remainig 0%. What is the problem…I select other sensor on battery monitor and measured correct volt and written. What is the problem.

-I want to buy sony a6300 with DYS 3 axis gimbal. I am consediring about HDMI TO AV converter. Which one converter suitable for a6300… For both shutter and video recorder. Thanks again…

did you set the correct mah as well?