so my early 2011 almost 1 year old macbook pro has used 43 battery cycles and 98% health so far according to istat widget thing. how accurate is istat? also, my dad has a 2010 macbook (a little more than 2 years) and has battery cycle 21 :O he plugs in his laptop most of the time he uses it. so is it good to plug it in when u use the laptop to stop the cycle from increasing? also, does the ipad battery cycle work the same way... the more you use it while plugging in, the longer the batter lasts?