SO 61% and it fell from the sky. After thinking about it, what if.... By putting it in at 61% after it has discharged to this, to me... obviously it didn't have a good connection. So my thinking is that it's not that intelligent of a battery, meaning that it's starting to look like it must be at 100% or 90%+ to establish a "full contact connection" needed between the battery and the P3. Being that it was only 61% or whatever, suggests that there is a cut off point somewhere above the 61% as far as complete connectivity. What I mean is, if you started off the day with 100% and took it down to 60% without taking the battery out, and then took off again, the connection was made when it was put in 7 minutes before (+-) . But being that the battery this time was left out until it discharged itself down to the 60%, the battery didn't have enough power (whether it be considered volts or amps) left in it to establish the complete connection needed to establish the "full contact connection". Like in a car, when it won't start on a cold day, you pop the hood and see if the positive lead will turn on its own, if it does, you wiggle it back and forth a couple times and the car has the connection needed and starts right up. Because the connections in the P3 are slip in, in order to basically pull the two parts together, you need enough voltage in the first place and at the 61%, they didn't have enough voltage to pull together and establish full contact. It was enough to take off, but being it wasn't complete, a few seconds later... it dropped the partial connection. So the question is, does the drone have a safety cut off built in and when the connection will not totally complete itself after a few seconds, it shuts itself back off, whether in the air or not? You all can see where I'm going on this. Basically you want to start out with a fully charged battery because it's needed to establish the complete connection. Obviously, this is just a theory... so take it as is...