I have not flown my P2V in a while, so I decided to charge up batteries and take it out. I went through all the pre flight check list and took off. All was good until I got a message on the app saying "Warning Low Battery discharge temp". It would quickly show up then disappear. I also noticed when I would give a lot of throttle my green light would blink red fast. In the process of bring it in. I continued to lose power and it went down in some trees. Any ideas on what to do?