Originally Posted by sirmaru
Most Lithium batteries can take 500 recharges before dying. Thus, it pays to let the battery run down to one bar before recharging.
Only the cheap ones. I have my Xperia since 1998 and the battery is still on top with charging it every day (I'm a heavy user), it still works with normal use up to 3 days. That's at least 700 charges. So if you charge it normally - when the battery is very low - and the battery is not a cheap one, you can live with it "forever" or at least until you buy a new generation device instead