Is there any way to stop the blinking LED, say, after 15 minutes or so? Like, if I go to sleep and get a message, the LED blinks all night til I check it. I know it probably doesn't waste too much battery but I don't like charging my phone overnight so I don't overcharge it, yet I need the phone to last the entire day the next day. So is there any way to get the LED to stop blinking if I don't check it for 15 minutes? Any apps or phone settings I might have overlooked?