From memory, I read an article from Apple saying:
-after 300 charges, the battery is about 80% effective
(or carries 80% left of its original charge, something along the lines of 80%)
This doesn't mean your battery is a goner, it just means your battery is no longer brand new.
Conclusion? I accepted the fact that nothing lasts forever and that the MacBook was designed to do work on the go.
This means you will be constantly charging and uncharging on the fly.
The people who designed these machines are smart.
Have faith in them.
I chose this product because it was the most ideal laptop in terms of price, and actually qualified it's own name of being a laptop.
You know what I'm talking about.
Those massive laptops which take 2 hands to carry and have bits and pieces hanging out.
Sure they are powerful and you can play games on campus, but as mobility goes they're just walking desktop computers if you ask me.