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Small silver coin cell CMOS battery for laptop motherboard

DBTLAP

DBTLAP CMOS battery for Compaq Presario CQ41-215AU

SKU CH-5GYX-1P12P

Lithium CMOS battery replaces the BIOS RTC cell on Compaq Presario CQ41-215AU motherboards

  • Battery TypeLithium
  • Direct replacement for Compaq Presario CQ41-215AU
  • Lithium chemistry provides stable CMOS power
  • Single battery replaces faulty RTC unit
  • Tested before shipping for reliable operation
  • Designed for motherboard BIOS memory only

CMOS battery for Presario CQ41-215AU

This lithium coin cell replaces the CMOS BIOS RTC battery on the motherboard of the Compaq Presario CQ41-215AU laptop. It maintains system time and firmware settings when the main power is removed. The unit is new and tested before shipping.

Replaces a dead or leaking original cell

Swap this in when the laptop loses the date, shows CMOS checksum errors or fails to retain BIOS changes after shutdown. The jump is worth it if the existing battery no longer holds a charge or shows physical damage. It is not for users who need a main laptop battery or a higher-capacity coin cell.

Fits the motherboard battery holder directly

The cell installs in the existing socket on the board, freeing the system from time-drift and configuration loss. No soldering or additional hardware is required beyond opening the chassis to reach the holder. Ensure the laptop is powered off and the main battery disconnected before fitting.

Highlights

  • Direct replacement for Compaq Presario CQ41-215AU
  • Lithium chemistry provides stable CMOS power
  • Single battery replaces faulty RTC unit
  • Tested before shipping for reliable operation
  • Designed for motherboard BIOS memory only

Specifications

Battery TypeLithium

Questions about this item

What connector does the CMOS battery use to fit the Compaq Presario CQ41-215AU motherboard?

The battery is a direct replacement for the original CMOS BIOS RTC cell on the laptop motherboard.

How is the CMOS battery installed, and what step is often missed?

Remove the old cell from its socket on the motherboard, insert the new lithium battery with correct polarity, then reset the BIOS date and time.

When will the CMOS battery need replacement again?

The lithium CMOS battery typically lasts several years before the system clock starts losing time, signalling it is time for a new cell.

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