Iphone ISO 4 drains battery if not careful

Be careful when you first upgrade to Iphone IOS 4. The multi-tasking feature is nice but it could come back to haunt you if you are not careful. If you hadn't noticed or haven't fully figured out how the multi-tasking works, every app you open and then close by pressing the home button, that app will now be stored in the running application spot. The place underneath the apps which we invoke by double pressing home button. Many apps are ok to be in this position but be careful with apps like trapster. This app will actively monitor or lets just say work in the background that before you know it, your battery will drained.

To close apps in the multi-tasking spot, just double press the home button and hold on to the app that needs to be closed. A minus sign appears on the app and press the minus sign to close the app. That's it! That would save your battery.