Since I frequently have difficulty "waking up" my new S2 after I have had it totally shut down for several hours (hangs on boot up), I'm just thinking, why "shut down" at all, unless there's a really significant battery drain during "sleep"? I realize that you probably wouldn't want to store it for long time periods "asleep", but why not, as long as you are pretty much using it every day or so? Is this practical or is that to battery draining?