After having owned my cellphone for about two years, I was expecting to notice a drop in battery life and it definitely has dropped - substantially. I have the Sony W810i, great phone, but it has always had crappy battery life. For the first few months, one charge would last me less than a day and a half. Now I'm happy if I can make it through a whole day without having to charge it in the car.

Here are a few things I've been doing to get the most juice out of my battery:

  • Turn down the brightness of the screen - most phones have this option
  • Reduce the time that the screen stays on after inactivity - I have mine set to the minimum (5 seconds)
  • Turn off the screensaver - Usually after a period of inactivity, a screensaver will play before the screen fully turns off
  • Set your wallpaper to "none" or "blank", especially if your phone is reading that wallpaper image from a memory card
  • On most phones, the screen stays on during a call, and this can drain the battery pretty quickly. Play around with your phone and figure out how to turn it off. In my case, while I'm on a call, if I hit the quick key to view my contact or goto the phone menu, the screen will turn off after 5 seconds
Hope this helps, and I'd love to hear back from you guys with other tips to help increase battery life.