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#1
It is probably because the hardware says the battery is dieing? And that maybe you should consider replacing the battery as per the message says? Just a thought.
someone say this is coz windows 7 power mng bug !!! wht u think ???
There have been claims that Windows 7's power management inaccurately shows battery wear levels (wear, not charge) and even damages them. Don't believe it.
logicearth is absolutely on the money: Your battery is going bad... You could download http://osirisdevelopment.com/BatteryBar/ and install it, it's a very nice app and will give you much more details about your battery's state.