I have an HP 314 that keeps switching off after about 2 hours of flight. Sometimes I get a low power warning, othertimes not. I use a seperate battery pack to charge the HP via the USB connection during flight and there is always lots of charge left inthe battery pack. I have also guessed that maybe the HP gets too hot from direct sunlight, but even when I keep it in a side pocket, this still happens with EVERY flight. Any suggestions on what the problem could be ? Thanks

Does it also happen at home on the desk?