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Small silver coin cell battery with two wire leads and white connector

DBTLAP

DBTLAP CMOS Battery for HP Pavilion DV3540ES

SKU CH-CGFS-DGBN2

Lithium CMOS battery replaces the RTC cell on HP Pavilion DV3540ES motherboards

  • Battery TypeLithium
  • Compatible with HP Pavilion DV3540ES
  • Lithium chemistry delivers reliable CMOS power
  • Replaces faulty or cracked RTC battery
  • Pre-tested unit ensures dependable operation
  • Single replacement battery included in package

CMOS RTC battery for HP Pavilion DV3540ES

This lithium CMOS battery replaces the real-time clock cell on the motherboard of an HP Pavilion DV3540ES laptop. It restores BIOS settings retention and system time when the original coin cell is exhausted. The part is supplied new and tested before shipping.

Practical limits of a coin-cell CMOS interface

A CMOS battery delivers only microampere current to keep volatile memory alive; it cannot power the laptop itself or charge the main battery. Voltage drops slowly over years, so sudden loss of BIOS data usually means the cell has reached end of life. The connector and form factor must match the motherboard header exactly.

Check your existing setup before ordering

Confirm that the target machine is an HP Pavilion DV3540ES and that the motherboard uses a two-pin CMOS header with the same pitch. Verify the old battery markings if accessible to ensure physical compatibility. This item is not a main laptop battery and will not fix power-on or charging faults.

Highlights

  • Compatible with HP Pavilion DV3540ES
  • Lithium chemistry delivers reliable CMOS power
  • Replaces faulty or cracked RTC battery
  • Pre-tested unit ensures dependable operation
  • Single replacement battery included in package

Specifications

Battery TypeLithium

Questions about this item

Is this the correct CMOS battery for my HP Pavilion DV3540ES?

Yes, this DBTLAP lithium CMOS battery is listed as compatible with the HP Pavilion DV3540ES model number 3540.

What does replacing the CMOS battery actually fix in my laptop?

A fresh CMOS battery restores power to the motherboard RTC chip so the system clock keeps time and BIOS settings are retained while the laptop is off.

Does this battery use a standard connector for the motherboard header?

The product is described as a direct replacement CMOS RTC battery for the specified HP Pavilion model.

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