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Small black coin-cell battery with red and black wires ending in a white two-pin connector

FOCUSTEC

FOCUSTEC Coin Cell RTC Battery Black

SKU CH-XM7C-VJW4K

Lithium-ion CMOS replacement with MOLEX 51021-0200-B connector fits Dell, HP, ASUS and Samsung laptops

  • Battery TypeLithium-Ion
  • Reliable CMOS backup from Japanese-made lithium-ion cell
  • Standard MOLEX 51021-0200-B 1.25 mm pitch connector fits listed models
  • Two-wire red/black polarity for correct installation
  • Anti-static bag protects cell during handling and storage
  • Every unit tested before shipping for dependable operation

FOCUSTEC Coin Cell RTC Battery

This FOCUSTEC coin cell RTC battery is a new replacement CMOS unit built with a high-quality lithium-ion cell manufactured by a Japanese battery giant. It targets laptop owners and repair technicians who need to restore real-time clock function after the original cell has drained. Each item is tested before shipping and arrives in professional anti-static packaging for safe handling.

Compatible laptop models and connector

The battery uses a standard MOLEX 51021-0200-B connector with a 1.25 mm pitch, two pins and two wires in red for positive and black for negative. Compatibility covers DELL models 830, 4050, 6530 and 7270; HP models 41, 8440 and G4; ASUS models 56 and 611; and Samsung models 467 and 458. Buyers should verify the connector against the second and third images before ordering.

When this battery is the right fix

This part replaces a dead CMOS coin cell that causes lost BIOS settings, incorrect system time or boot errors on the listed laptops. It is not for buyers who need a main laptop battery pack or a higher-capacity power source for extended mobile use. The jump is worth it when the motherboard still works but the real-time clock has stopped keeping time.

Highlights

  • Reliable CMOS backup from Japanese-made lithium-ion cell
  • Standard MOLEX 51021-0200-B 1.25 mm pitch connector fits listed models
  • Two-wire red/black polarity for correct installation
  • Anti-static bag protects cell during handling and storage
  • Every unit tested before shipping for dependable operation

Specifications

Battery TypeLithium-Ion

Questions about this item

Will the MOLEX 51021-0200-B connector fit the existing socket on my Dell Latitude D830 motherboard?

The battery uses a standard MOLEX 51021-0200-B 1.25 mm pitch connector with two pins and red/black wires that matches the original CMOS header on the D830.

How can I confirm the replacement coin cell is holding the system clock after installation?

Power on the laptop, enter the BIOS setup and verify the date and time remain correct after a full shutdown and restart.

Does the package include any mounting hardware or tools, or is it just the battery in the anti-static bag?

Only the coin cell battery with attached wires and connector inside the professional anti-static packaging bag is supplied; no screws, brackets or tools are included.

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