Signs Your Iphone Battery Needs To Be Replaced. If your iPhone unexpectedly shuts down when the battery still has a good charge it isnt a good sign. If your iPhone has any damage that impairs the replacement of the battery such as a cracked screen that issue will need to be resolved prior to the battery replacement.

IPhones can retain up to 80 percent of their charging capacity for up to 500 cycles. The situations include a fall from a considerable height. The easiest way to identify the need for iPhone battery replacement is to observe the iPhones battery life.
This is another indication that your iPhone is in need of a battery replacement right away.
4 years is an edge case. The easiest way to identify the need for iPhone battery replacement is to observe the iPhones battery life. Its easy to tell if it needs replacing. You will see what the maximum capacity of you battery is - this is a measure of your battery.

