Interesting read about the effects of cold and hot weather on battery. Quite sure there is eventually some side effect, probably too minimal to notice. Used my 6 plus in Seoul earlier this year and it was around 5 degrees Celsius in the evenings, no problems whatsoever, didn't notice any drops in battery performance. Not sure about below zero. But isn't heat the one factor which could affect battery life? Anyone tried using the 6 in Dubai during summer?