Originally Posted by Thatzmister2u
Honestly, this issue has been discussed quite frequently but I am glad you have the solution to your battery issue!
To avoid applications running in the background always use Menu>End (or Close) or Escape to exit a program. Never use the Red End key as it will place the application in the background.
I've seen many threads that just skimmed through this problem or say a fix but leaves novice user on their own. Nobody really thoroughly explained it. A situation such as this should be of upmost concern to many who are frustrated with their battery. Also, I thought it'd be a good idea to make this sort of a database so others can compare and discuss whats the most optimimal for battery saving (ie. having only the basic programs yields 20hrs as opposed to having about 9 apps yields about 7 hours.)