HP DV3-2350el - system clock loses time

Hi,
I have a HP Pavilion DV3-2350el, just returned back from a repair by HP in warranty.
Now I've noticed that the system clock loses time when the notebook is off.
I think it should be a CMOS battery issue, but I haven't found any information about it.

Hi,
How old is your machine ? Normally a CMOS battery can last for 4 or 5 years. Anyway, you may want to try yourself or bring it back to the repairer to reseat the CMOS battery. You can download this manual, page 4-22 shows you how to work with the RTC (or CMOS) battery.
   http://h10032.www1.hp.com/ctg/Manual/c01998025.pdf
Regards,
BH
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