We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small rectangular CMOS battery with two wires ending in a white 1.25 mm MOLEX 2-pin plug

FOCUSTEC

FOCUSTEC CMOS laptop battery 2-pin 2-wire MOLEX 51021-0200-B 1.25 mm

SKU CH-558M-PCV42

Replacement CMOS battery with a 2-pin MOLEX 51021-0200-B connector for compatible Dell Latitude models

  • Battery TypeLithium-Ion
  • Japanese-manufactured coin cell ensures reliable CMOS power
  • MOLEX 51021-0200-B 1.25 mm connector matches original socket
  • Two-pin two-wire layout fits listed DELL Latitude models
  • Anti-static bag protects cell during handling and storage
  • Every unit tested before dispatch for consistent performance

Compatible Dell Laptop Models

This FOCUSTEC CMOS battery replaces the coin cell in a wide range of Dell Latitude laptops. The list covers D500, D510, D520, D530, D610, D620, D630, D810, D820, D830, E5250, E5430, E5440, E5530, E5540, E6230, E6420, E6430, E6520, E6530, E6540 and E7240 models. It restores system time and BIOS settings when the original cell fails.

Two-Pin MOLEX Connector

The battery uses a MOLEX 51021-0200-B connector with a 1.25 mm pitch and two pins on two wires. This exact plug is required for the Dell Latitude models listed above. Laptops that use a different pin count, wire arrangement or pitch will not accept this part. Builders working on other brands or newer Dell series should look elsewhere.

Connector Pitch Decides Fit

The single specification that determines compatibility is the 1.25 mm connector pitch combined with the two-pin, two-wire MOLEX 51021-0200-B plug. If the motherboard header matches this pitch and pin layout, the battery will connect and function. If the pitch or pin arrangement differs, the part cannot be used.

Highlights

  • Japanese-manufactured coin cell ensures reliable CMOS power
  • MOLEX 51021-0200-B 1.25 mm connector matches original socket
  • Two-pin two-wire layout fits listed DELL Latitude models
  • Anti-static bag protects cell during handling and storage
  • Every unit tested before dispatch for consistent performance

Specifications

Battery TypeLithium-Ion

Questions about this item

Will the 1.25 mm pitch MOLEX 51021-0200-B connector fit my Dell Latitude E6420 motherboard header?

The battery uses a standard MOLEX 51021-0200-B connector with 1.25 mm pitch and two pins; match this header on the board before installing.

What is the correct polarity orientation when plugging the 2-pin MOLEX connector into the Dell Latitude E6430?

Align the keyed MOLEX 51021-0200-B housing so the red wire meets the positive pin on the motherboard; forcing it reversed can damage the CMOS circuit.

How long does the lithium-ion coin cell typically last before the CMOS settings reset on a Dell Latitude E6540?

The Japanese-manufactured lithium-ion coin cell generally maintains CMOS power for several years; replace when the system loses date or BIOS settings after shutdown.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.