The thing I hated about the Iphone is you can't replace the battery as easy. I have the S3. Put your phone on power saver and it will be good. Sucks if you want to use the internet because it will go dim. But for the most part my phone lasts all day. At 54% and it's been on for 12 hrs. If you don't want to use power save mode, maybe get a cause that has a extra battery in it. The thing I miss about the Iphone is Itunes.