Sparkuus 3 These batteries are absolutely fine in warm and hot weather, but if it is even slightly cold, the power level crashes in seconds! I tried to take a video outside in 5 degree C weather, and the battery indicator went from almost full to empty in under one minute, and the camera shut off. When I went back inside and it warmed up, the power level went back up.There is no help for it, any videos I want to make in the winter, I have to use my phone because these batteries just can't handle any kind of chill!