First put the dead laptop battery in a zip lock.
Then put the zip into refrigeratory and keep it in freezer for 14 - 15 hours.
Afer waitinf for a long time, take the dead laptop battery out of refrigeratory .
Using clean and soft cloth to dry the battery and get the battery to room temperature (about 20° - 25°)
In the end fully charging and discharging the battery for 3 - 4 cycles.
Now you would see that your dead battery holding up charge for 1-2 hours.
See the detail video in metacafe.com
View more info in : http://www.laptops-battery.co.uk/blog/revive-dead-laptop-battery.htm