That is just the batteries level being recognized by the system.
If you use an high output battery the most it ever says is 60% charged because the system doesn't see the remainder of the battery.
Same sort of thing.
No empirical evidence that the charge life actually changes.
Mine lasts a day or two and always has, right out of the box.
6 hours is bad.
hemi- how long did your charge last(after you did the above?) Keep us posted, day to day? How long were your full charges lasting you every day, prior?
AngryHatter- congrats on your 24-48 hours. You seem to me one of the lucky few. Mine has NEVER lasted more than 12-15 hours since I bought brand new. The rest of us have to figure something else out