How to extend your iPhone battery life
It's happened to the best of us: You're on your cell phone in the middle of an important call, when suddenly: NOTHING. Your battery dies on you, leaving you in the lurch and disconnected from the person you were talking to. Few things in the electronics age are as annoying. The iPhone can be especially prone to this problem, because it has such an incredible amount of activity going on inside of it at any one time. On Apple's website, they give a somewhat exaggerated expectation for how long the battery should last. This doesn't account for users' tendency to multitask, however: using the Internet or email at the same time as talking on the phone via Bluetooth, for instance. Because multitasking means a shorter battery life, it is, therefore, especially important that you develop a strategy for preserving your iPhone's battery life.
Strategy number one: Remember to turn off your Bluetooth whenever you're not using it. Many people don't understand that the Bluetooth is a big drain on the battery. When you keep it turned on constantly, even when not in use, you are wasting valuable battery power.
There is a pre-determined amount of battery power controlled by the Bluetooth feature on your iPhone. Remember that the Bluetooth's number one function is to communicate with other Bluetooth compatible devices. Therefore it is alwsays searching for other Bluetooth devices—a function that can present quite a drain. Therefore, if there is no need at the time to pair the phone with another Bluetooth device, turn the Bluetooth feature off.
Strategy number two: Remember to lock your iPhone when you are not using it. Activate the lock button whenever you've finished talking on the phone, reading your email, and surfing the Web. It's true that the device will shut itself down automatically—and indeed, many people wait for it to do so rather than locking it manually. By doing this, you are wasting power.
Along with this, be sure to set the iPhone's auto-lock. This way, if you forget to lock it, this will take care of it for you. We suggest setting it for one minute after use. While many owners set it for five minutes after use, think about how much power this consumes. If you multiply this five minutes of power by ten times during the day (assuming you will, quite likely, use it that many times), and your battery will drain very quickly. Setting it for one minute instead will help ensure that the iPhone screen will not stay lit when it's not being used. These two strategies will help you preserve your iPhone's battery life and keep it ready to go when it's needed.