I've just added the Power Control widget, and except for the background sync button, it's quite clear what the other options are doing. For example, I turn off GPS from the widget, and then in settings under location, the GPS is off. However, although I have an idea that background sync prevents options from syncing unless they are brought to the forefront, I don't see what option in settings it is changing. Is there a way to disable background sync without using the widget? I'm sure it's something very obvious, but I can't find it! Any ideas?