Has your iPhone battery been proving problematic lately? Maybe it shows that it has about 30% charge remaining, only to go off without warning. If you have ever experienced a jumpy iPhone battery, then you definitely know just how frustrating that can be. Your first thought when you experience this would probably be to replace your battery. However, there is a much simpler way to deal with the problem. Calibrating an iPhone's battery has often proven to be a true and complete cure to a problematic battery.