Revive dead HP Pavilion DV4000 laptop battery

We buy laptop for our daily life and office work. When we show a demo or PPC for our customers or work on non power supply rooms with laptops. We also worry about its laptop battery. As the all laptop battery have their life, after charging for about 600-800 cycles it cant work, we call them as "dead laptop battery".
When we have no latitude HP Pavilion DV4000 battery replacement, we try to revive dead laptop batteries.In fact revive dead Pavilion DV4000 battery is simple work. You can use some physical methods to activation the dead battery cells. Usually you can revive dead laptop battery using familiar tools. You only need a refrigeratory, a locked bag, a charger. Then do the following works step by step. You shall revive your dead laptop battery.

First put the dead HP Pavilion DV4000 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 HP Pavilion DV4000 battery and get the battery to room temperature(about 20° - 25°)

In the end fully charging and discharging the Pavilion DV4000 battery for 3 - 4 cycles.

Now you would see that your dead battery holding up charge for 1-2 hours.

What are you waiting for, why not take a try to your dead laptop battery? Good luck.