Retro Computing Grotto

CMOS

Toshiba 2140CDS CMOS Battery Replacement

The CMOS batteries for the Toshiba 2140CDS are still readily available on eBay and Amazon so I p…

How To Replace The CMOS Battery on a Compaq Presario 700 Laptop

Step 1 - On the bottom of the laptop, remove the two torx headed screws holding the bezel in pl…

Replacing The CMOS Battery on a Dell Latitude D630/D620

Step 1 - Unplug from the mains and remove the battery Step 2 - Remove the hinge cover (make sure…

Do You Have To Match A CMOS/BIOS Battery Exactly?

The short answer is as long as it's the same voltage and you're not replacing a recharge…

How To Replace The IBM ThinkPad 380D (Type 2635) CMOS Battery

On the IBM ThinkPad 380D laptop the CMOS batter for the BIOS is located under the RAM cover on …

Compaq Contura 3/25 intel 80386SX

Just got around to opening up the Compaq Contura 3/25 I 'won' on eBay the other week to …