Apple's iPhone has been a huge success for the company, but like any battery-operated device, there are a few things you can do to maximize battery life. For example, depending on how they are configured, a few features will certainly decrease your iPhone's battery life. If you're a lucky iPhone owner, check the following:

1. Turn off your Mail auto-check feature, or at the very least, increase the auto-check interval. To turn auto-check off completely, from your Home screen choose Settings > Mail > Auto-Check, then tap on Manual. To increase the interval, go to Settings > Mail > Auto-Check and tap "Every Hour." This is a global setting that applies to all active mail accounts except for push mail accounts (when this is enabled).

2. If you have a push mail account, turn it off. Go to Settings > Mail, choose the push mail account, then click on Advanced, and change Use Push Mail to "Off."

3. Auto-check fewer Mail Accounts. You can do this by turning off a mail account or simply deleting it.

4. If you rarely use the Wi-Fi feature, turning it off saves a significant amount of power.

5. Turn off Bluetooth if you rarely use the feature.

6. Dim your iPhone's brightness, since the brighter your screen is, the faster it sucks up battery power!

7. Applying an equalizer setting to song playbacks decreases battery life. Go to Settings > iPod > EQ and tap off.