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Small silver coin cell CMOS battery with two wire leads and a white connector

DBTLAP

DBTLAP CMOS Battery for Toshiba Portege R400-S4832

SKU CH-G0RN-1EPYB

Replacement lithium CMOS battery restores BIOS settings for Portege R400-S4832 tablets

  • Battery typeLithium
  • Compatible with Portege R400-S4832 tablet PC
  • Lithium cell maintains accurate BIOS clock settings
  • Tested before shipping for reliable operation
  • Direct replacement for faulty CMOS battery
  • Single unit supplied ready for installation

CMOS Battery for Portege R400-S4832

This DBTLAP lithium CMOS battery replaces the BIOS RTC cell on a Toshiba Portege R400-S4832 tablet PC. It is intended for technicians or owners repairing a motherboard that has lost time and date settings. The part is a direct replacement for the original coin cell, not a main laptop battery.

Thermals Noise and Power Draw

As a passive lithium coin cell, the battery generates no heat and produces no audible noise during operation. It draws negligible current to maintain the real-time clock and CMOS memory when the system is powered off. No active cooling or power management is required.

Build Quality and Connectors

The battery is supplied new and tested before shipping to ensure reliable voltage output. It arrives as a single unit ready for installation on the motherboard's CMOS header. Replacing a faulty or depleted cell restores persistent BIOS settings without further configuration.

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

How is the DBTLAP CMOS battery installed on the Portege R400-S4832, and which step is often missed?

Open the chassis, locate the coin-cell holder on the motherboard, remove the old cell, insert the new lithium unit with the correct polarity, then reassemble; the step often missed is verifying the BIOS clock holds time after first boot.

What maintenance or replacement will this CMOS battery need later?

The lithium CMOS cell typically lasts several years; when the system clock drifts or BIOS settings reset, replace it with another coin cell of the same voltage and form factor.

What limit appears first on the Portege R400-S4832 during sustained use of this CMOS battery?

The primary limit is the cell’s own shelf life; under continuous operation the battery will eventually exhaust its charge, causing the real-time clock to lose accuracy and BIOS settings to clear.

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