I have a CellPro Multi4 that I use to charge the lipos of other birds. Can such a charger be used to charge and, more importantly, put a storage charge on the DJI batteries? I have lost 4 DJI batteries to failure. They all deplete rapidly, resulting in auto land. I'm guessing it's because I stored at an incorrect charge. There is a whole other thread about keeping a list of such batteries to give to DJI, but how do we prove we didn't store them improperly? Is improper storage even the real reason? Does anyone truly know?