MBP's battery never fully charged..

[sunrobby]

Hi, i have my MBP never shutted down, i put it to sleep when im not using it with the power adapter still plugged in. After couple of days i realized that the light in the magsafe connector is now orange, no longer green like usual. When i lok at System Preferences -> Energy Saver the battery is 100% charged. I've calibrated the battery before. If i unplug the magsafe when the MBP is off, the light was green for one second then it'll goes orange.. Somethings wrong here.. It wasnt like this before. The light was always green. Anyone can help?

 

[sunrobby]

More information, i have this MBP since a month ago but start to never shut it down since about a week, before that i always shut it down if im not using it. Before today, the magsafe light always green when the battery fully charged. Maybe its not a good idea to put it to sleep while always plugging the power ?