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Small coin-shaped lithium CMOS battery for Toshiba Satellite M40X-118

DBTLAP

DBTLAP CMOS Battery for Toshiba Satellite M40X-118

SKU CH-YF3H-BGN4V

Lithium CMOS battery keeps BIOS settings and clock running on Toshiba Satellite M40X-118 laptops

  • Battery TypeLithium
  • Direct-fit CMOS replacement for Satellite M40X-118
  • Lithium cell keeps BIOS clock and settings alive
  • Tested before dispatch so it works on arrival
  • Single unit supplied — ready to install
  • Fixes date-loss and boot errors from dead CMOS

Direct replacement for Satellite M40X-118

This lithium CMOS battery restores the real-time clock and BIOS settings on a Toshiba Satellite M40X-118 laptop. It is intended for owners whose original cell has failed and who need a tested, new replacement.

Passive coin cell with negligible draw

The battery operates without active cooling and adds no audible noise to the system. Power consumption is limited to the microampere leakage required to keep CMOS memory alive.

Plugs into the motherboard header

Installation requires access to the laptop mainboard and a compatible two-pin connector. No additional cables, drivers or software are needed, freeing the user from BIOS reset errors at every boot.

Highlights

  • Direct-fit CMOS replacement for Satellite M40X-118
  • Lithium cell keeps BIOS clock and settings alive
  • Tested before dispatch so it works on arrival
  • Single unit supplied — ready to install
  • Fixes date-loss and boot errors from dead CMOS

Specifications

Battery TypeLithium

Questions about this item

How do I install the CMOS battery in my Toshiba Satellite M40X-118 and what step often goes wrong?

Power off, unplug and open the case; locate the coin cell on the motherboard, note the + side orientation, pop the old cell out and press the new one in with the same polarity — reversing the polarity is the common mistake.

What maintenance or replacement will this CMOS battery need later?

The lithium cell holds BIOS settings and the system clock; after several years it will drain and need a straight swap with an identical coin cell when the clock drifts or settings reset.

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

The cell voltage gradually drops until it can no longer maintain the real-time clock and CMOS RAM, at which point the laptop loses time and BIOS defaults on every cold start.

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