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Small round lithium CMOS battery for Sony Vaio PCG-F409

DBTLAP

DBTLAP CMOS Battery for Sony Vaio PCG-F409

SKU CH-65CZ-D9W44

Lithium CMOS battery keeps the Sony Vaio PCG-F409 system clock and BIOS settings running

  • Battery TypeLithium
  • Compatible with Sony Vaio PCG-F409 model
  • Lithium chemistry maintains BIOS settings reliably
  • New CMOS battery replaces faulty original unit
  • Tested before shipping for dependable operation
  • Package includes one replacement CMOS battery

Compatible Sony Vaio PCG-F409 CMOS Battery

This DBTLAP lithium CMOS battery is built for the Sony Vaio PCG-F409 laptop motherboard. It supplies the low-voltage power needed to keep the real-time clock and BIOS settings active when the main battery is removed. The part is intended for repair technicians and owners replacing a depleted or damaged original cell.

Tested Lithium Cell With Low Power Draw

Each unit is tested before shipping to verify reliable voltage output. The lithium chemistry delivers stable current with minimal self-discharge, so the system clock stays accurate during long periods without mains power. Normal operation draws only microamps, placing negligible load on the motherboard circuitry.

Direct Replacement For Failed Original CMOS Battery

This part replaces the factory-fitted coin cell when the laptop loses time, date or BIOS configuration after shutdown. The upgrade is worth it when the original battery no longer holds charge or shows physical leakage. It is not suited for the main laptop power pack or for models other than the PCG-F409.

Highlights

  • Compatible with Sony Vaio PCG-F409 model
  • Lithium chemistry maintains BIOS settings reliably
  • New CMOS battery replaces faulty original unit
  • Tested before shipping for dependable operation
  • Package includes one replacement CMOS battery

Specifications

Battery TypeLithium

Questions about this item

How is the CMOS battery installed in the Sony Vaio PCG-F409, and what step is often missed?

Open the chassis, locate the coin-cell socket on the motherboard, remove the old cell, insert the new lithium battery with the positive side facing up, then enter BIOS to reset the date and time — the step most people skip.

What maintenance or replacement will this CMOS battery need later?

The lithium CMOS battery typically lasts several years; when the system clock starts losing time or BIOS settings reset at power-off, replace it with another CR-series coin cell.

What limit appears first under sustained use of this CMOS battery?

The lithium chemistry gradually loses voltage; once it drops below the threshold needed to keep the real-time clock and CMOS RAM alive, the PCG-F409 will forget BIOS settings on each cold boot.

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