Why My New Iphone Battery Drain So Fast. Instead the app crashes in the background and your iPhone battery beings to drain without you even knowing it. Fix iPhone Software Issues without Data Loss.

More specifically its how these applications perform and various settings that cause iPhone batteries to die fast. To turn off Background App Refresh go to SettingsGeneralBackground App Refresh. Change a new and stable Wireless or cellular connection.
While the smartphone is charging and discharging the lithium ions in the battery move through an electrolyte between cathode and anode.
If you still find your iPhone battery draining fast even after all these fixes - then its probably time for a new battery. Among the widely known reasons common factors are as follow. Therefore you should check if your iOS requires any update and install them immediately. Check the Battery Wear or Battery Capacity.
