http://www.bestbuymobile.com
The Best Buy Mobile team explains how you can save battery life by closing applications that are running in the background of your Blackberry device.

Hi my name is Darnell, from the Best Buy in Lancaster and what I’m going to show you today, is how to close an application on your BlackBerry.
So, if you have your BlackBerry, you go to a simple application. Something like BlackBerry app world. We’ll open up BlackBerry app world and when BlackBerry app world opens, basically what you want to do is close an application to keep your battery running fresh. Hit your menu button there, scroll all the way down to the bottom and down the bottom it says close. Press your close button and your app is closed and the application is not running in the background, which is draining your battery.