The newly released iOS 4 came with a new Feature called “Multitasking”, this feature Enable iPhone and iPod Touch users to Change Apps in Background by Double Hit on Home Button. People think that Multitasking waste the battery life of iPhone but Steve Jobs has replied an Italian user telling him “Trust the iPhone”
As you see in the screenshot above, Alain was asking Jobs about a way to close all Apps in Background instead of closing every App individually to save battery life. Steve jobs replied that he don’t need to close background Apps to save battery life!