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Small round lithium CMOS battery with attached wire connector

DBTLAP

DBTLAP CMOS Battery for Sony VAIO VGN-CR420E/N

SKU CH-84RN-9KEMC

Replacement CMOS RTC battery restores BIOS settings on compatible Sony VAIO laptops

  • Battery typeLithium
  • Keeps system time accurate with lithium CMOS cell
  • Direct replacement for Sony VAIO VGN-CR420E/N motherboard
  • Restores BIOS settings after faulty battery failure
  • Each unit tested before dispatch for reliability
  • Single battery included for straightforward installation

Compatible Sony VAIO Model

This DBTLAP CMOS battery is designed for the Sony VAIO VGN-CR420E/N laptop. It serves as a direct replacement for the motherboard's real-time clock battery. The part is not a main laptop battery and will not power the system during use. It is intended for users needing to restore BIOS settings retention.

Battery Type Specification

The cell uses Lithium chemistry to maintain the system clock and CMOS memory when the laptop is unplugged. This specification determines whether the part matches the original motherboard requirements. Buyers should verify their service manual calls for a lithium coin cell before ordering.

Sustained Load Behaviour

Under the continuous microamp draw of a motherboard RTC circuit, the lithium cell delivers stable voltage for an extended service period. It is tested before shipping to ensure reliable operation. The battery is not designed for high-current applications or primary system power.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $10.99
Typical for this category: the median of 10,440 items is $10.99.

Specifications

Power
Battery typeLithium

Questions about this item

What does the CMOS battery actually do once it is inside a Sony VAIO VGN-CR420E/N?

It keeps the real-time clock running and preserves BIOS settings while the main power is off, so the laptop remembers the correct date, time and boot configuration every time you start it.

What type of connection does this lithium cell use to attach to the motherboard?

The cell is a standard coin-type CMOS battery that plugs directly into the motherboard’s dedicated CMOS header on the VAIO VGN-CR420E/N.

Will this battery physically fit the CMOS slot on my VAIO VGN-CR420E/N?

Yes, it is built as a direct replacement for the original CMOS RTC battery used in the Sony VAIO VGN-CR420E/N, matching the form factor and connector of the factory part.

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