Why does my iPhone 5s battery die so quickly?
For a while now the battery on my iPhone 5s has been dying very quickly. At 8:30am it can be at 100% and be completely flat at 5pm the same day. It also gets very hot whilst charging. I am very careful as to when I plug it in and only do so if it is below 10%. Just today I restored it to factory settings but it has not made a difference. According to a battery app I downloaded on the App Store, the average battery life for my phone model is around 22 hours. My phone would struggle to reach 7! I do not use it excessively, as I am only on it every couple of hours. Any help appreciated, as I am new to this page. Thanks in advance.
iPhone 5s, iOS 8.3, iPhone bought last July.