I´m bidding on a auction for crashed Phantom 3 Adv. I do not care about AC much, but seller has nice case and 3 batteries with it. As the crash occurred 2017 autumn it is safe to assume, that nobody charged the batteries meanwhile. So over a year storage time. Now reading all this above made me wonder if it is a good idea to pay some money for it and gamble or not. Has anybody lost they battery for long term storage?