Why isn't my mobile phone battery lasting as long as usual?

You may have been using it more than usual or you may have been in an area with poor reception (your phone works harder to try and find a signal and this can use up more battery than usual).

You may also have applications running in the background, so even though you’re not actively using them, be sure to shut them down properly.

As a tip, try to let the battery run down completely before charging it up again.