The Clevo M570ETU date and time was constantly resetting itself, which indicated that the CMOS battery is malfunctioning. Located a M570ETU service manual online and found the what sort of CMOS battery I needed (CR2023). Purchased it on eBay and replaced it. The video shows a failed replacement attempt, because I have plugged the connector of CMOS battery in a wrong way and the reversed polarity kept resetting the time and date settings (More of this stupid mistake in the image gallery link). Only after finishing shooting the video I realised what I have done wrong and corrected the mistake.
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Photos where I moronically modify the new CMOS battery thinking, that the new battery (the purchased battery was for Lenovo/IBM laptop) has a reversed polarity connector.