In some cases, the outdated app can create the issue.
So, before you decide to replace the battery of your i Phone, try to update all the apps on your i Phone.
By doing this test, you will know does the battery has a draining issue or not.
Usage time is the total time the i Phone has been used since the last full charge.
Find out more about the tips and trick to extend your i Phone battery life at the end of this article.