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What RTC (BIOS) battery is used in HP Probook 4540s and when should I replace it?

HP Probook 4540s
Microsoft Windows 7 (64-bit)

Hi there! Let me know what RTC (or BIOS, CMOS) battery is used in HP Probook 4540s? Your service guide doesn't tell it.

My notebook is at least 3 years, I don't have any problems at the moment - but it would be good to know when should I replace it?

 

Thank you

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What RTC (BIOS) battery is used in HP Probook 4540s and when should I replace it?

@Renoise

 

Hp part number   683502-001

 

Your manual here.

 

http://www.hp.com/ctg/Manual/c03758231.pdf

 

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.TRS5&_nkw=683502-00...

 

REO

 

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What RTC (BIOS) battery is used in HP Probook 4540s and when should I replace it?

Sorry, but I wanted to know what battery type is used there? I know it's a button cell battery, but which one (CR 2025, CR 2032 or other?)

Wouldn't it be cheaper to just buy a new battery instead of buying a whole spare part with those 2 cables?

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What RTC (BIOS) battery is used in HP Probook 4540s and when should I replace it?

@Renoise

 

It's hard to tell.

 

If you look at the Ebay listings you will see that they are wrapped in plastic.

 

It could be the CR 2025 or the CR 2032. "They are both 3v."

 

Reo

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What RTC (BIOS) battery is used in HP Probook 4540s and when should I replace it?

Ok, what about when should I replace it? How much time usually that battery works in HP Probooks?

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What RTC (BIOS) battery is used in HP Probook 4540s and when should I replace it?

@Renoise

 

My company refurbishes 7-10 thousand laptops per month.

 

Most are Dell, HP and IBM's.

 

The HP's we process most are the ProBooks and EliteBooks.

 

Many are much older than yours and we rarely need to replace the BIOS/RTC battery.

 

The exact Born on Date of your laptop can be calculated by your Serial Number.

 

XXXYWWXXXX

 

Y = YEAR

 

WW = WEEK

 

REO

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