well easily, your battery kaput
you're wasting your battery cycle

i wont recommend the way you use, i have a very good example
my dad macbook is nearly 3 years
the battery still very genki

use it as normal will plug in, even fully charge, just let it be, only be portable when you need portable, mean only use battery when away from desk. And do calibration every months, means fully drain the battery then charge back

although they are both start will "A" company
but they are really different
i'm pre-acer user as well

since 3/4 years back, apple design circuit was so intelligent, it will automatic stop the charging and allow the computer will direct power in only

we did have debate whether is was software control or hardware control

my fren told me windows vista will perform the same operation as well, i not quite sure
Sony Computers do have the features as well

well, you wont wanted to always take out and put in your battery, dont you?
you dont want to waste your battery cycle, dont you?
so, just plug on the power, nothing to worry

when you see charged, mean battery fully charge, when your mac will use direct power from adapter.

better or not.... well i manage to have batter battery service period. My dad fren did the same as you, his battery kaput after year plus. They bought the mac almost the same time. So, how do you think?

how much it cost?

yes, your web browsing must have no flash and java

factory battery life time is meant to cheat you

for what model of mac?