In case you've one of the notebook models listed above then immediately check the battery pack number by removing the battery from the back panel. Below are the battery numbers of the affected models:
If your battery number is in the above list then contact the HP Customer Care at the following numbers:
1800112267 (BSNL/MTNL lines within India), 30306363, 011-26388000
We advise you to get your notebook checked through respective HP service centers or certified computer technicians.
The last battery pack replacement program was announced on October 30, 2008.