I don’t fly if the ambient temp is > 102 degrees F, I have 9 batteries for my M2P purchased in fall of 2018. I have had one battery swell and fail. All the batteries have about 150 flights. I store as recommended by DJI and don’t fully charge until flight day. Swollen batteries should never be in flight. I would contact FJI directly if I had a battery with only 60 flights and it failed.