Lippsman or someone half as smart as him about computers[which doesnt leave many]

I have a SONY VAIO laptop, not sure if model matters..........when I unplug the charger and I have the lappy on high performance [bright] it only lasts 20 minutes. It used to last longer than that. Now ive recently noticed that it dies about 2minutes before the 20 minute mark. Eventually will I only have 5minutes? Is there a way to reverse this? fix it? No?

Definately the battery is going, take it off high performance and it will last a little longer, but should look into getting a new battery.

Srtezz nailed it.....Those Sony batteries are not cheap though.  E-Bay will be your friend, but try to get a real deal Sony replacement instead of those cheap knock offs.

I need the exact make and model of the Sony.  There may be two numbers.  One should be on the LCD bezel and the otherone on the bottom of it.