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Small round lithium CMOS battery with wire connector, new condition

DBTLAP

DBTLAP CMOS Battery for Sony VAIO VGN-AR51J

SKU CH-4NZ7-0Q7WZ

Replacement CMOS battery for Sony VAIO VGN-AR51J motherboards, tested before shipping

  • Battery TypeLithium
  • Replaces faulty CMOS battery on Sony VAIO VGN-AR51J
  • Lithium cell maintains BIOS clock and settings
  • Tested before shipping for reliable operation
  • New replacement part restores motherboard function
  • Package includes one CMOS battery for installation

Compatible CMOS Battery for VAIO VGN-AR51J

This DBTLAP lithium CMOS battery is designed specifically for the Sony VAIO VGN-AR51J laptop motherboard. It serves as a direct replacement for the original BIOS RTC battery that maintains system time and firmware settings when the main power is disconnected. The unit is new and tested before shipping to ensure reliable operation.

Single-Unit Replacement Package

The package includes one CMOS battery, providing exactly what is needed for a single motherboard repair. No additional cables, brackets or software are supplied, so the installer must reuse any existing connector or mounting hardware from the original battery. This keeps the kit focused on the essential component without unnecessary extras.

Suitable for Targeted Motherboard Repairs

This battery suits technicians and owners fixing a VAIO VGN-AR51J that has lost BIOS settings or shows a CMOS checksum error. It is not intended for other laptop models, desktop motherboards or as a main power source. Buyers needing a different form factor, voltage or multi-pack quantity should look for a part matched to their specific hardware.

Highlights

  • Replaces faulty CMOS battery on Sony VAIO VGN-AR51J
  • Lithium cell maintains BIOS clock and settings
  • Tested before shipping for reliable operation
  • New replacement part restores motherboard function
  • Package includes one CMOS battery for installation

Specifications

Battery TypeLithium

Questions about this item

How often will this lithium CMOS battery need replacing in a Sony VAIO VGN-AR51J?

A lithium CMOS battery typically lasts several years before the system clock drifts or BIOS settings reset, signalling it is time for a fresh unit.

What is the first sign that the battery is failing during continuous operation?

The first limit you will notice is the real-time clock losing time or the BIOS reverting to default settings after the laptop has been powered off for a while.

Does the battery generate any noticeable heat or noise when the laptop runs all day?

No, a CMOS battery draws only microamps and produces no audible noise or measurable heat during normal daily use.

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