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Friday, 17 April 2026

Toshiba 2140CDS CMOS Battery Replacement

The CMOS batteries for the Toshiba 2140CDS are still readily available on eBay and Amazon so I purchased a few of them a while ago so now it's time to get it fitted!..

First things first, we need to get the laptop open!

Removing the Keyboard:

 

Removing the screws from the top cover:

 

Removing the Battery and the Hard Disk Drive:

 

Removing the screws from the bottom cover:


Disconnecting the cables:



And it's open!



The CMOS battery is hidden under a plastic flap at the bottom left hand corner of the laptop but you'll soon spot it as it has 2 wires (black and red) coming out of it:

 

WRONG CONNECTOR 🙁

Don't throw away the old CMOS battery just yet as you may need it!!

 

A bit of splicing, some solder and heat shrink tubing (and some double sided tape to hold it in place) and we're done!

 

Now to put it all back together!

 


The CMOS Battery has now been replaced.


Links:

Service Manual

Recovery CD ISO

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