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Small silver coin cell battery with red and black wires attached

DBTLAP

DBTLAP CMOS battery for Dell XPS 15-L521X

SKU CH-80WC-TX4CJ

Lithium CMOS battery keeps Dell XPS 15-L521X system clock and BIOS settings accurate

  • Battery typeLithium
  • Replaces the CMOS BIOS RTC battery on Dell XPS 15-L521X
  • Lithium chemistry provides stable real-time clock power
  • Tested before shipping to ensure reliable operation
  • New replacement part for faulty or broken units
  • Package includes one CMOS battery for motherboard installation

Targeted Replacement for Dell XPS 15-L521X

This CMOS battery is designed specifically for the Dell XPS 15-L521X laptop motherboard. It serves as a direct replacement for the BIOS RTC battery that maintains system time and firmware settings. The component is intended for technicians or owners servicing this exact model. It is not a main laptop power battery.

Lithium Cell Restores BIOS Function

The lithium chemistry provides the steady voltage needed for real-time clock and CMOS memory retention. It comfortably handles the low-current demands of firmware storage for extended periods. The cell runs out when the system clock drifts or BIOS settings reset unexpectedly. A fresh unit restores reliable boot behaviour.

Single Battery Ships Pre-Tested

The package includes one CMOS battery that has been tested before shipping. This verification step reduces the chance of installing a dead cell. No cables, holders or additional hardware are bundled. The sole accessory is the battery itself, ready for immediate installation.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 60% of the 10,440 comparable items (median $10.99).

Specifications

Power
Battery typeLithium

Questions about this item

Will this CMOS battery fit the Dell XPS 15-L521X motherboard without adapters?

This CMOS battery is built as a direct replacement for the Dell XPS 15-L521X motherboard and ships ready to install.

How can I confirm the new CMOS battery is holding the BIOS settings on my Dell XPS 15-L521X?

After fitting the battery, power on the laptop, set the date and time in BIOS, then shut down and restart; if the settings remain, the RTC battery is functioning correctly.

Does the package include the single CMOS battery only, or are cables and tools also provided?

The box contains one CMOS battery; no cables or tools are included.

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