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

DELL

DELL Alienware m15 CMOS BIOS RTC Battery 87K3D

SKU CH-QZ53-NFEFC

Genuine Dell OEM CR2025 3 V CMOS battery keeps the Alienware m15 real-time clock running

  • Product typeLaptop-computer-batteries
  • Genuine Dell OEM part ensures exact fit
  • CR2025 3V chemistry keeps system clock accurate
  • Direct replacement for Alienware m15 motherboards
  • Part number 87K3D matches factory specification

Genuine Dell OEM BIOS RTC Battery for Alienware m15

This is a genuine Dell OEM replacement part carrying part number 87K3D. It is built to fit the Alienware m15 laptop and uses a standard CR2025 3V coin cell. The battery maintains the system clock and BIOS settings when the main power is removed.

Steady voltage retention under continuous standby

The CR2025 chemistry delivers a stable 3V output during the long, low-current drain that occurs while the notebook is off or stored. It avoids the voltage sag that can appear with lesser cells after weeks of inactivity. Buyers who need a rechargeable CMOS solution or a higher-capacity form factor should look elsewhere.

How it compares

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

Price $5.99
Cheaper than about 95% of the 27,760 comparable items (median $30.99).

Specifications

Product
Brand nameDELL
Product typeLaptop-computer-batteries

Questions about this item

How much power does the CR2025 3V cell draw while the Alienware m15 runs all day?

The CMOS battery only powers the real-time clock when the laptop is off, so it draws negligible current during daily use.

Which connector or cable must the Alienware m15 already have for the 87K3D battery to fit?

The board uses a standard CR2025 coin-cell holder; no extra cable or adapter is required.

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