It's important to manage your battery life so that your iPhone is usable whenever you want it.
Many iPhone users are annoyed by the short battery life when the phone is used excessively. Fortunately, Apple recommends some steps you can take to help your iPhone retain its battery charge for longer durations of time.
Instructions
1. Keep your iPhone as close to room temperature as possible. Room temperature is considered 72 degrees F, and your iPhone can function perfectly in temperatures ranging from 32 degrees F to 95 degrees F. At the very extreme, the battery will function between minus 4 degrees F to 113 degrees F; anything outside that range will permanently damage the battery's ability to retain a charge.
2. View your iPhone's usage statistics to determine what's causing your battery drain. Go to "Settings," "General," "Usage," and take a look at how long your iPhone has been awake versus how long it has been in Standby mode. If your phone is awake more than in standby and you haven't been using it, there is something running in the background that is using up your battery life.
3. Use the iPhone's Auto-Brightness feature, or reduce your screen's overall brightness, to help retain battery life. Your iPhone uses a lot of battery power to brighten your LCD screen, so keeping the brightness down preserves the battery. iPhone Auto Brightness uses its camera to detect how much light there is at your location and adjusts the screen brightness accordingly. To set it, go to "Settings," "Brightness" and turn "On" Auto-Brightness. To reduce your screen's brightness, go to "Settings," "Brightness" and slide the brightness level to a lower setting.
4. Turn the Apple Push Notification Service off. The Push Notification feature is used by the Apple App Store to send you auto notifications of data updates. This is usually a lesser-used feature, and turning it off slows the battery drainage. Turn it off by going to "Settings" and "Notifications."
5. Turn Bluetooth off. Unless you have a Bluetooth device that you are constantly using, leaving the Bluetooth capability on drains your iPhone's battery. Go to "Settings," "General" and turn Bluetooth "Off."
6. Turn off your Wi-Fi and 3G and use the iPhone's "Airplane Mode" whenever you do not need to make or receive calls or data. Even though your iPhone is sitting in stand-by, Wi-Fi or 3G running the in the background still burns precious battery life. Set your iPhone to pull data and update your email less frequently, as well.
7. Let the battery fully charge and fully drain dead at least once a month. This ensures that the battery keeps the electrons in its lithium-ion battery moving.
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