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Small round lithium CMOS battery with two wire leads and connector

DBTLAP

DBTLAP CMOS Battery For TOSHIBA Satellite Pro L40-PSL4BE

SKU CH-4T2K-NMVF6

Lithium CMOS battery replaces the BIOS RTC cell on Toshiba Satellite Pro L40-PSL4BE motherboards

  • Battery TypeLithium
  • Keeps system clock and BIOS settings accurate
  • Lithium cell delivers reliable low-voltage power
  • Direct replacement for faulty CMOS batteries
  • Pre-tested unit ensures dependable operation
  • Designed for TOSHIBA Satellite Pro L40-PSL4BE

Purpose and fit

This CMOS battery is a direct replacement for the TOSHIBA Satellite Pro L40-PSL4BE motherboard. It restores BIOS settings and real-time clock function when the original cell fails. It is not a main laptop battery and will not power the system during use. Buyers needing a primary power source should look elsewhere.

Thermals noise and power

The lithium cell operates passively with no moving parts or active cooling. It draws negligible current only when the laptop is unplugged and switched off. There is no fan noise, no heat output and no measurable impact on system power consumption during normal operation.

Included accessory impact

The package includes one tested CMOS battery ready for installation. No cables, adapters or software are supplied. Swapping the cell restores date, time and firmware configuration retention without additional setup steps.

Highlights

  • Keeps system clock and BIOS settings accurate
  • Lithium cell delivers reliable low-voltage power
  • Direct replacement for faulty CMOS batteries
  • Pre-tested unit ensures dependable operation
  • Designed for TOSHIBA Satellite Pro L40-PSL4BE

Specifications

Battery TypeLithium

Questions about this item

How do I install the CMOS battery in my TOSHIBA Satellite Pro L40-PSL4BE and what step is often missed?

Open the chassis, locate the coin cell on the motherboard, unplug the old connector, fit the new lithium cell, and reconnect it; the step often missed is forgetting to reseat the connector fully so the BIOS clock resets on next boot.

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 clear at power-off, simply replace the cell with another compatible unit.

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

The cell's voltage gradually drops until it can no longer maintain the real-time clock and CMOS memory, causing date/time loss and configuration resets.

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