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Small coin-cell CMOS battery with wire leads for HP Probook 4540S

DBTLAP

DBTLAP CMOS Battery for HP Probook 4540S

SKU CH-H9CJ-JEKY7

Lithium CMOS battery keeps the HP Probook 4540S system clock and BIOS settings running when the main power is off

  • Battery TypeLithium
  • Lithium chemistry provides stable BIOS power
  • Direct fit for HP Probook 4540S motherboard
  • Pre-tested unit ensures reliable first boot
  • Replaces faulty CMOS battery to fix clock errors
  • Single battery included for immediate installation

Compatible CMOS Battery for HP Probook 4540S

This lithium CMOS battery replaces the BIOS RTC cell on the motherboard of an HP Probook 4540S laptop. It maintains system time and firmware settings when the main power is disconnected. The unit is tested before shipping and arrives new in a single-piece package.

For owners of a Probook 4540S needing a direct RTC

This part suits anyone whose Probook 4540S loses the date, time or BIOS configuration after a shutdown. It is not a main laptop battery and will not power the system for portable use. Buyers who need a primary power pack for mobile operation should look elsewhere.

Lithium chemistry for the motherboard RTC circuit

The battery uses a lithium cell designed for the low-current real-time clock on the Probook 4540S motherboard. This chemistry provides the stable voltage required to retain CMOS data over long periods without mains power.

Highlights

  • Lithium chemistry provides stable BIOS power
  • Direct fit for HP Probook 4540S motherboard
  • Pre-tested unit ensures reliable first boot
  • Replaces faulty CMOS battery to fix clock errors
  • Single battery included for immediate installation

Specifications

Battery TypeLithium

Questions about this item

Does the HP Probook 4540S need any special tool to fit this CMOS battery?

The battery plugs straight onto the motherboard header, so a small Phillips screwdriver to open the chassis is all that is required.

Will this replacement keep the BIOS settings on my older Probook 4540S if the original cell has leaked?

Yes, the new lithium cell restores the RTC power rail, so date, time and BIOS configuration are retained once the old unit is removed.

How can I confirm the CMOS battery is working after I install it?

Power on the laptop, enter the BIOS and verify that the clock holds the correct date and time after a full shutdown.

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