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Posts: 8
Member Since: ‎03-08-2014
Message 1 of 6 (1,359 Views)

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

Product Name: HP Probook 4540s
Operating System: 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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Posts: 19,224
Member Since: ‎07-18-2011
Message 2 of 6 (1,347 Views)

Re: 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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Top Student
Posts: 8
Member Since: ‎03-08-2014
Message 3 of 6 (1,333 Views)

Re: 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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Posts: 19,224
Member Since: ‎07-18-2011
Message 4 of 6 (1,323 Views)

Re: 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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Top Student
Posts: 8
Member Since: ‎03-08-2014
Message 5 of 6 (1,321 Views)

Re: 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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Member Since: ‎07-18-2011
Message 6 of 6 (1,311 Views)

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

[ Edited ]

@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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