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Small silver coin cell battery with two wire leads and a white connector, number 21 on the side

DBTLAP

DBTLAP CMOS Battery for Sony VAIO VPCCW21FX/B

SKU CH-SHAN-QJCK5

Replacement CMOS RTC battery for Sony VAIO VPCCW21FX/B laptop motherboards

  • Battery TypeLithium
  • New CMOS battery restores BIOS settings
  • Lithium chemistry provides reliable timekeeping
  • Compatible with Sony VAIO VPCCW21FX/B
  • Tested before shipping for dependable operation
  • Single replacement unit included in package

Compatible Sony VAIO CMOS Replacement

The DBTLAP lithium CMOS battery is built as a direct replacement for the Sony VAIO VPCCW21FX/B motherboard RTC cell. It restores BIOS clock and configuration retention when the original coin cell is exhausted or damaged. The part is tested before shipping to confirm reliable operation on the target platform.

Lithium cell capacity and limits

The lithium chemistry supplies the steady micro-current needed to keep real-time clock and CMOS settings alive while the laptop is powered off. It comfortably maintains date, time and boot-order data for the service life typical of a standard CR-series coin cell. The cell cannot power the main system or charge the primary laptop battery; it serves only the firmware backup circuit.

Single-unit pack with pre-ship test

The package includes one CMOS battery and no additional cables, adapters or software. Each unit is verified by the supplier before dispatch, reducing the chance of receiving a dead-on-arrival cell. There is no diagnostic utility or firmware tool bundled; installation is a manual motherboard swap.

Highlights

  • New CMOS battery restores BIOS settings
  • Lithium chemistry provides reliable timekeeping
  • Compatible with Sony VAIO VPCCW21FX/B
  • Tested before shipping for dependable operation
  • Single replacement unit included in package

Specifications

Battery TypeLithium

Questions about this item

Will this CMOS battery fit the Sony VAIO VPCCW21FX/B motherboard I am keeping?

The battery is listed as compatible with the Sony VAIO VPCCW21FX/B laptop model.

How can I verify the CMOS battery is working after I install it?

The battery is tested before shipping; after installation the system should retain BIOS settings and the correct date and time without resetting.

What comes in the package and do I need any extra cables or connectors?

The package includes one CMOS battery; no additional cables or connectors are mentioned.

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