Loveless says, "99.9% of the time it is not actually iOS that is causing your battery to drain quickly. I guarantee you that if you erased your phone and there were no apps or email on it, it would last for ages."
First, you should determine whether you are experiencing battery drain. Head over to Settings > General > Usage and check out your times. Your device usage time should be significantly lower than your standby time. If that is not the case, you likely have a problem.
Loveless outlines 8 steps you can take to try and identify the issue. Check out the full guide at the link below...
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