My powerbox is new and I noticed after the first flights a big difference between the consumption of the two batteries (150 mA for battery 1 compared to 450 mA for battery 2). I doublechecked the batteries and I crossed them (Battery 2 plugged on socket 1 and battery 1 plugged on socket 2) but the problem was still present. So, I changed the output voltage and put it at 5,9v, instead of 7,4v, and then, the problem dissapeared. I put again the voltage at 7,4v and did a factory reset, and just after that I had an error message "Regulator malfunction". When I do the same sequence at 5,9v I have no error message. So, I think I have an issue with one of the two regulators at 7,4v. Is it a software issue or something else (My version is V25) ? Thank you for your feedback.