HCL — NO BATTARY BACKUP

My HCL laptop bearing Machine Number - 9084AX125836 was purchased in the month of January 2009 from Kroma Stores, Pune. There were two problems which happend in my laptop in the month of Oct 2009. I went to the authorised service centre of HCL at Patiala, Punjab on 20 Oct 09. These problems were DVR Drive was not working and low battery backup. The senior Manager of Service centre Mr Navin Garg had then send my laptop to service centre Chandigarh.when i received my laptop on 17th nov 09 my DVR drive was repaired but the battery backup came down to 03 minutes which was earlier 35 mins(within one year of purchase of my of laptop). I tried to contact Mr Navin garg on his mobile [protected] but he did not attend any of the calls.I spoke to Mr Sahil and Mr Ajay mishra at HCL service centre about my problem. I was told register my complain on net. I would request you to kindly look into this matter as it causing me great problem since last one month.
thanking you
capt Ashiq Rishabh