Why does my iphones battery die so fast? There are a lot of different factors that can go into a low-battery issue. Firstly you should make sure that you are using your phone properly. For example, your phone might be running out of power due to the fact that it is being locked in an awkward position or because it is not receiving enough power from the wall socket. A lot of things can affect how long your battery lasts and these range from software settings all the way up to hardware problems.