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Small round lithium CMOS battery with two wire leads and a white connector

DBTLAP

DBTLAP CMOS battery for HP EliteBook 8540p

SKU CH-469X-J4B11

Replacement CMOS battery restores BIOS settings on HP EliteBook 8540p laptops

  • Battery TypeLithium
  • Keeps BIOS settings alive with lithium chemistry
  • Direct fit for HP EliteBook 8540p motherboard
  • Replaces faulty CMOS cells without soldering
  • Each unit tested before leaving the factory
  • Single battery packaged ready for installation

CMOS Battery for HP EliteBook 8540p

This DBTLAP lithium CMOS battery replaces the RTC backup cell on the motherboard of an HP EliteBook 8540p. It maintains BIOS settings and the system clock when the main battery is removed or depleted. The unit is new and tested before shipping. It is a coin-cell component, not a main laptop power battery.

For owners of an HP EliteBook 8540p with BIOS errors

This part suits users whose EliteBook 8540p shows CMOS checksum errors, loses the date and time, or fails to retain BIOS configuration. It is not for users who need a main rechargeable battery to run the laptop unplugged. It also does not fit other HP models or other brands without verified compatibility.

Lithium coin-cell chemistry

The battery uses lithium chemistry to provide stable low-current power for the real-time clock and CMOS memory. This chemistry determines the voltage and form factor required by the 8540p motherboard. Matching this specification is the single factor that decides whether the part will function correctly in the target machine.

Highlights

  • Keeps BIOS settings alive with lithium chemistry
  • Direct fit for HP EliteBook 8540p motherboard
  • Replaces faulty CMOS cells without soldering
  • Each unit tested before leaving the factory
  • Single battery packaged ready for installation

Specifications

Battery TypeLithium

Questions about this item

What physical space does the CMOS battery for the HP EliteBook 8540p occupy on the motherboard?

The cell is a compact lithium button battery designed to sit in the standard CMOS holder on the EliteBook 8540p system board.

Which step is most often missed when fitting the replacement CMOS battery in an HP EliteBook 8540p?

After inserting the new cell, the BIOS clock and settings must be reset, otherwise the laptop will keep showing a checksum error on boot.

When should the CMOS battery in an HP EliteBook 8540p be swapped again?

Replace it once the system clock starts losing time or the BIOS settings clear themselves after a cold start.

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