How To Extend Your iPhone’s Battery Life [iPhone Tips]
Heat can degrade performance of your iPhone ’s battery. So it is important to keep the iPhone out of the sun or a hot car (including the glove box).
Set auto-Lock interval (Settings > General > Auto-Lock) so that your iPhone will turn off more quickly after a period of inactivity.
Use location services only when needed (Settings > General > Location Services).
Fetch email or other data less frequently (Settings > Mail, Contacts, Calendars > (more…)
