This problem started happening recently. Every time I unplug my laptop to use it, the expectancy on it goes lower and lower every time, where its at about 30 minutes now, compared to 90 minutes about a year ago. Also, it seems to decrease a minute or so every time I recharge and unplug it. I already recalibrated the toshiba satellite c650-17n battery, but it doesn't seem to have made a difference. Do I need a new laptop battery or could there be something worse? Thanks