How do I change memory battery in HP 15s-eq2510sa and where is it ?

[Videostar]

Hi, I keep losing the time and date when I close the HP 15s-eq2510sa (but not if I shut it down. I suspect the memory battery is failing and needs changing but where is it ? It is not obvious on the mother board unless it is not one of the "silver button" types. Any ideas ?

[Paul_Tikkanen · Accepted solution]

Hi:

Your notebook does not have a CMOS/RTC battery.

The main battery also serves as the CMOS/RTC battery to maintain the BIOS and system clock settings.

Below is the link to the service manual:

c06510442.pdf (hp.com)

Chapter 3 has the list of parts.

You will find no CMOS/RTC battery listed.

Chapter 5 has the component removal and replacement procedures.

You will find no procedure to remove and replace a CMOS/RTC battery.

[Videostar]

Many thanks for that, I assume therefore, that the main battery is on its way out although I still get plenty of working time with it. I bought the laptop as "refurbished" just over a year ago so I don't know how much previous use the battery has had. I will accept the intermittent time & date change until the on-time drops to a level which is unacceptable. I think I can accept your post as the solution, thanks once again.

[Paul_Tikkanen]

You're very welcome.

You may want to test the battery.

This link has various methods to do that:

HP Notebook PCs - Testing and calibrating the battery (Windows) | HP® Support