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Small cylindrical lithium CMOS battery with wire leads

DBTLAP

DBTLAP CMOS RTC Battery for Sony VAIO VPCF135FG/B

SKU CH-JJSH-T433H

Keeps system time and BIOS settings on Sony VAIO VPCF135FG/B laptops with a tested lithium CMOS battery

  • Battery TypeLithium
  • Lithium chemistry provides stable CMOS power
  • Direct fit for Sony VAIO VPCF135FG/B
  • Replaces faulty or cracked RTC battery
  • Pre-tested unit ensures reliable operation
  • Single battery included for immediate installation

Compatible CMOS RTC Battery for Sony VAIO

This lithium CMOS RTC battery is designed for the Sony VAIO VPCF135FG/B laptop motherboard. It maintains system clock and BIOS settings when the main power is removed. The part is supplied new and tested before shipping. It is intended for owners of this specific model who need to replace a depleted or faulty CMOS cell.

Steady voltage retention over years of continuous

A lithium CMOS cell delivers a stable low current to the real-time clock and CMOS memory for extended periods. Unlike a main laptop battery it does not cycle under heavy load, so its voltage remains consistent until the chemistry is exhausted. This behaviour ensures reliable boot configuration retention day after day without sudden drops that would corrupt BIOS data.

Simple two-wire plug installation on the motherboard

The battery connects via its original connector to the designated header on the VAIO VPCF135FG/B board, requiring no soldering. Common issues arise when the connector orientation is reversed or the retention clip is not fully seated, which can cause intermittent contact. Careful alignment and a firm push until the clip clicks avoids these problems.

Highlights

  • Lithium chemistry provides stable CMOS power
  • Direct fit for Sony VAIO VPCF135FG/B
  • Replaces faulty or cracked RTC battery
  • Pre-tested unit ensures reliable operation
  • Single battery included for immediate installation

Specifications

Battery TypeLithium

Questions about this item

Does the CMOS battery run hot or draw noticeable power during continuous operation?

The lithium CMOS cell supplies only a tiny standby current to keep the real-time clock running, so it generates no perceptible heat and consumes negligible power.

What must already be present in the laptop for this battery to function?

A Sony VAIO VPCF135FG/B motherboard with a standard CMOS battery socket is required; the cell simply plugs into that existing connector.

Will this replacement work reliably in a Sony VAIO VPCF135FG/B that has been in service for many years?

Yes, the tested lithium cell restores BIOS timekeeping on the original VPCF135FG/B motherboard just like the factory part.

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