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- Notebook Hardware and Upgrade Questions
- 8640p RTC/ CMOS battery

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07-09-2025 04:32 PM
The manual of this notebook covers 3 different models.
The subject model is: Elite NoteBook 8640P Product: XU057UT#ABA
Serial #: CNU132135K
page 78 chapter 4 shows how to remove and replace the RTC/CMOS battery. I can't find this on the bottom of the subject notebook with the cover removed. It needs a new power battery, which is ordered.
Is this model one of the few that did not have an RTC battery?
If not, can you provide a better picture of its location please.
Its happily running W11
07-09-2025 05:17 PM - edited 07-09-2025 05:18 PM
This YouTube video shows how to remove the RTC/CMOS battery.
The actual RTC/CMOS battery removal starts at minute 7:40.
How to disassemble an HP 8460P - YouTube
It doesn't look anything like what is shown in the manual.