Now I know iphones have poor battery anyway but I am sure the last month or so mine has got worse. Had the phone just over a year and it gets used a lot. I brought a plus so I didn't need to cart around a ipad for studying,playing games,music and watching TV. Not due for a upgrade until Nov. Do these battery's have a sort life if there hammered and is it a pain to change to it? Not sure if I should change it or just wait for a upgrade. My friends say change to a samsung or something but iv'e brought a lot of music and films from itunes and don't want to lose them all. The battery used to have about 50-60% life by the time I got home from work but by lunch time its now down to that so something is wrong with it. I do charge sometimes in flight mode so it charges quicker so could that of done damage? I don't know much about phones so hoping someone here might?