When my iPhone 5s dies, it usually turns on after 5-7 minutes of charging. Now, it sometimes takes 45 mins to over an hour to turn on while it's plugged in.
It also dies very easily. It can be at 100% battery, then within 10 minutes it's at 60%. Sometimes my phone even turns off at 100 or 50%.
Can somebody explain why this happens or what I should do? Is my battery broken?