At the beginning of the use of the new netbook also wondered how to keep advertising 8 hours of battery life. Prostodyrovo dozens of forums, I realized that I read a few totally opposing views. Stopped on one idea: the manufacturer is not beneficial to the longevity of Your battery.
So the official answer is most likely full cycles of charge/discharge (at least once in two weeks), then the capacity decreases rapidly. With this approach, we should not forget that the battery is the "head". It counts the number of cycles and artificially ouimet hours. In addition, there is a difference in the chemical composition — "lose" capacity only NiMH batteries. LiIon no.
Remove the battery — variant sound, in my opinion, questionable. A charged battery will sit (remember even the players).
I'm in my samsung n150 LiIon battery trying to plant a fully rechargeable battery. Leave at least 15% and in the socket. Houses are connected with food. Thus, the battery is almost always charged. After full charging, the controller disables the charging and the CBO just works to bypass the battery from the mains 220V.
For almost a year of use, the loss in capacity by 2-3% (according to the little utility hanging in the system tray near the clock).
The above material is purely personal opinion and my own approach to this issue.