How to Extend Your Apple iPhone 5, 4S, 4, 3GS Battery Performance Between Charges with These Tweaks
Not sold on Apple's iPhone claims of battery performance? I will show you some simple tweaks and tips to reduce that rapid battery drain and extend the use of your iphone between charges -free.
iOS displays the battery level in the top right corner of the status bar. You can keep track of the charge remaining in your iPhone (5, 4, 4S, 3GS) more accurately by turning on the battery percentage indicator, which displays the battery status as a percentage.
In my experience leaving push on and changing Fetch to hourly or even manually save me a 1% power drop every 2-3 couple hours while idle.
Turn off LTE if it is not available in your area Settings, General, Cellular, Enable LTE. You can turn it off if you're not using it and turn it on again when you need it.
Using Wi-Fi drains the iPhone's battery
one of the most intensive processes is when the iPhone's Wi-Fi chip has to search for available networks. So if this happens regularly it's going to have a noticeable impact on your battery.
Dimming the screen will extend your battery life by lowering the default screen brightness. Launch the Settings app, scroll down and tap on Brightness & Wallpaper and adjust the brightness down.
Turn off Location Services helps to conserve battery life. To turn off Location services; go into Settings/ From there scroll down to Privacy, Tap that and then tap Location Services at the top, at the top of the next page is a toggle where you can turn all Location Services to Off or turn off location services on a per app basis
Apple advises users to charging the battery to 100% and then completely run it down once a month. This will condition the battery and fix any power memory issues.