My Dad flew with a battery that had not been fully charged. The battery was showing 50% on take off. You'd think there would be enough for even a short flight right?... No. Auto land initiated at 48% and it was panic time. Not to worry, a kind hearted very tall fir tree clutched and held the Phantom safely in its arms. It took $200 to convince the old tree to release it's treasure. Spending a short time making sure your batteries are FULLY charged will help prevent loss and is worth it.