I know that some years ago, I read that one should not run a laptop on AC power but should instead charge the battery, then use it til its almost discharged, then charge it again, and so on. The idea was that somehow, the AC power caused the battery to go through a discharge/charge cycle over and over again very rapidly (charging up to full immediately after discharging just a little bit) and that since the battery has a lifetime defined in terms of the number of charge cycles it goes throough, this is harmful to the battery.
My question is, does this still apply to laptop batteries? Or have things changed since I read that?
-Kris