Replacing CMOS battery HO Elitebook 840

[UKdodger]

How do I remove and replace this CMOS battery?

 Thanks

[Paul_Tikkanen]

There are several different generations of the Elitebook model series.

Based on the model Wi-Fi adapter I see in your screenshot; I would guess that you have an 840 G1.

See chapter 5, page 64 of the service manual for the RTC battery removal and replacement procedure.

The page also has the RTC battery part number.

c04655205.pdf (hp.com)

[resistencia]

Hi @UKdodger 

for more information watch the video

https://youtu.be/ixTVAWUhZTw?t=141

[UKdodger]

Thanks fo the lnks and help.

[Paul_Tikkanen]

You're very welcome.

You can probably find a battery on eBay:

665733-001 for sale | eBay

[UKdodger]

Thanks again Paul. If I find the answer I'll post it to let others know.