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Small coin-cell CMOS battery for Dell Latitude 820 laptop

DBTLAP

DBTLAP CMOS Battery for Dell Latitude D820

SKU CH-3299-K8E2F

Lithium CMOS RTC battery replaces the motherboard clock cell in Dell Latitude D820 laptops

  • Battery TypeLithium
  • Compatible with Dell Latitude D820 motherboards
  • Lithium chemistry powers BIOS clock reliably
  • Tested before shipping for dependable startup
  • Direct replacement for faulty CMOS units
  • One battery included for quick installation

CMOS Battery for Dell Latitude D820

This lithium CMOS battery replaces the BIOS RTC cell on Dell Latitude D820 laptop motherboards. It is a dedicated motherboard component, not a main laptop power battery. The part arrives new and tested before shipping.

Passive operation with no power draw

The battery sits on the motherboard and maintains system time and BIOS settings when the laptop is off. It generates no heat, produces no noise and draws no power during normal operation. Installation requires opening the chassis to access the board.

Single battery included in package

The box contains one CMOS battery only, with no cables, brackets or software supplied. The component directly restores clock and configuration retention for the D820 platform. Buyers needing a main system battery or charger will not find it here.

Highlights

  • Compatible with Dell Latitude D820 motherboards
  • Lithium chemistry powers BIOS clock reliably
  • Tested before shipping for dependable startup
  • Direct replacement for faulty CMOS units
  • One battery included for quick installation

Specifications

Battery TypeLithium

Questions about this item

How do I install the CMOS battery in my Dell Latitude D820?

Power off the laptop, disconnect the main battery, open the case, unplug the old CMOS battery connector and fit the new DBTLAP cell in its place.

What maintenance will this CMOS battery need later?

The lithium cell will eventually deplete; when the system clock drifts or BIOS settings reset, replace it with an identical coin-type unit.

What limit appears first under sustained use?

The cell voltage slowly drops over years of continuous operation, eventually losing the charge needed to keep the real-time clock running.

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