I have two batteries for my Potensic Atom drone. I flew about two weeks ago and fully charged both batteries when I got home. The batteries are stored in my warm home. I checked both batteries today as I am going flying tomorrow and was a bit shocked to see they were both down to around 50% capacity. Does that seem normal? I would have expected them to still have 90 - 95% left. The drone and batteries were both purchased a month ago.