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

DELL

DELL CMOS BIOS Battery MR652 8F7G4 for Latitude Precision Vostro

SKU CH-N7H6-4F7A8

Genuine Dell OEM CMOS BIOS battery maintains system settings for compatible Latitude, Precision and Vostro laptops

  • Typelaptop-computer-batteries
  • Genuine Dell OEM part ensures reliable CMOS memory retention
  • Direct replacement for MR652 and 8F7G4 part numbers
  • Supports Latitude 6420, 6230, 7490, 5410, 5411, 5510, 5511
  • Compatible with Precision 3540, 3550, 4600, 6600, 7550 models
  • Fits Vostro 1500 maintaining original system time and BIOS settings

Genuine Dell OEM CMOS Battery

This is a genuine Dell OEM CMOS BIOS battery carrying part numbers MR652 and 8F7G4. It supplies the low-voltage backup power that keeps system time and firmware settings alive when the main battery is removed or depleted. The component is built to Dell specifications for reliable operation across the supported laptop families.

Replaces Aged or Failed BIOS Cells

The battery replaces an original cell that no longer holds charge, which is the common cause of lost BIOS configuration, incorrect system clocks and boot-time checksum errors. A swap is worth it when the laptop shows those symptoms or when the machine has been in service for several years and the original cell has reached the end of its useful life.

Steady Backup Power Under Continuous Use

Under sustained load the cell delivers a stable voltage to the real-time clock and CMOS memory without the voltage sag seen in degraded units. It maintains firmware settings through repeated cold starts, long storage periods and mains-power interruptions, ensuring the platform posts correctly each time.

Highlights

  • Genuine Dell OEM part ensures reliable CMOS memory retention
  • Direct replacement for MR652 and 8F7G4 part numbers
  • Supports Latitude 6420, 6230, 7490, 5410, 5411, 5510, 5511
  • Compatible with Precision 3540, 3550, 4600, 6600, 7550 models
  • Fits Vostro 1500 maintaining original system time and BIOS settings

Specifications

BrandDELL
Typelaptop-computer-batteries

Questions about this item

Will the MR652 battery fit inside a Latitude 5410 chassis?

The MR652 is listed as compatible with Latitude 5410, Latitude 5411, Latitude 5510, Latitude 5511, Latitude 7490, Precision 3540, Precision 3550, Precision 7550, Precision M4600, Precision M6600, Latitude E6230, Latitude E6420, Latitude ATG E6420 and Vostro 1500.

How is the CMOS battery replaced, and which step is often missed?

Power off the laptop, disconnect the main battery, open the case, unplug the old coin-cell cable from the motherboard header, connect the new MR652 cable to the same header, reassemble, then enter BIOS to reset the date and time — the step many forget.

When will the MR652 coin cell need replacement again?

A CMOS coin cell typically lasts three to five years; replace it when the system loses date, time or BIOS settings after being powered off.

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