Bill Fisher:Is Dan correct? Have you noticed the same phenomena?
On the phone signal side of things, my experience is a very digital answer - it really is either on or off. I don't seem to get a bad signal, I either have a signal or I don't.
With the battery, I have noticed that it spends more time under 50% as I absolutely hammer mine.
It may be a case of perception. When your battery is above 50%, life is good so you don't have to worry about the battery life. But, below 50% you start to consider the possibility of running out and so you begin to pay more attention. Now your perception has shifted.
Plus, how low do you allow your to fall before charging it? If you charge at 10%, that is 10% less time in the lower half...