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Small round lithium CMOS battery with two wire leads and a white connector plug

DBTLAP

DBTLAP CMOS Battery for Dell Latitude 2120

SKU CH-A7S5-BJ45T

A lithium CMOS battery that keeps the Dell Latitude 2120 system clock and BIOS settings accurate

  • Battery TypeLithium
  • Keeps system time accurate with dedicated CMOS RTC battery
  • Lithium chemistry provides reliable low-power retention for BIOS settings
  • Direct replacement for Dell Latitude 2120 motherboard CMOS battery
  • Pre-tested unit ensures dependable operation on installation
  • Single battery included for straightforward motherboard maintenance

Dell Latitude 2120 CMOS Replacement

This lithium coin-cell battery restores the real-time clock and BIOS settings on a Dell Latitude 2120 notebook. It is intended for owners of that specific model who are experiencing date resets or CMOS checksum errors. The part is a direct replacement for the original factory-fitted cell.

Soldered Lead Mounting

The battery ships new and pre-tested with attached leads for motherboard soldering. This design requires basic soldering skill and equipment; it is not a plug-in module. Build quality follows standard lithium coin-cell construction for reliable voltage retention over the service life.

Fixes Date Reset and BIOS Loss

Replacing a depleted cell restores persistent system time and CMOS configuration without a full motherboard swap. The upgrade is worthwhile when the laptop otherwise functions but loses settings after power loss. It does not address main battery runtime or charging issues.

Highlights

  • Keeps system time accurate with dedicated CMOS RTC battery
  • Lithium chemistry provides reliable low-power retention for BIOS settings
  • Direct replacement for Dell Latitude 2120 motherboard CMOS battery
  • Pre-tested unit ensures dependable operation on installation
  • Single battery included for straightforward motherboard maintenance

Specifications

Battery TypeLithium

Questions about this item

What battery type does the CMOS battery for the Latitude 2120 use?

It uses a lithium chemistry cell to maintain the system clock and BIOS settings when the main power is removed.

What physical format does the replacement CMOS battery for the Latitude 2120 require?

It is a standard coin-cell module with attached leads and a connector that plugs directly onto the motherboard header.

How is the CMOS battery installed in the Latitude 2120, and what step is often missed?

Disconnect main power, open the chassis, unplug the old cell from the header, connect the new one, then reassemble; many forget to unplug the main battery first.

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