Thanks for your replies. That's really interesting. Is there any way to make sure this doesn't happen again? Do I need to condition the batteries somehow, or discharge them and start again? Thanks again.
Thanks for the advice. Really appreciate it. I've never experienced anything like that before. I've never had to use the map to locate the drone. Bit of a newbie on that front! Cheers.
Yep, don't leave batteries lying doing nothing for months at a time. Charge them periodically, and run them through a cycle or 2 to keep them in decent condition.
Also, when you first take off, just hover a few feet above the ground for 1...