CMOS Batteries

Are all or most Toughbook CMOS Batteries the same or at least the same voltage. I have a spare CF-27 one and a CF-M34 on the way with out a CMOS Battery.

 

I am not 100% but I think they are. I used a CF-T7 bios battery to replace the dead battery in my CF-P1 (tough phone). Everything matched up, even the plug in.

 

Thanks I'll see when the M34 comes, think this one will take a bit more work than the others I bought.

 

Well the battery did not fit, though I think it uses the same 3volt lithium cell (CR2032). The plug on my spare CF-27 battery has 2 sockets the one on the CF-M34 is a 3 socket one. Looks like a few laptops use the CR-2032 battery for their CMOS. The wires on the 27 battery were also to short to fit in the correct place. The voltage reading of the spare battery was 2.78volts which I think is on its last legs? Have ordered a pack of 20 CR-2032's and am looking at away to attach the wire tags?????? would anyone know how to do this?

 

The battery cases are stainless and don't take solder well at normal soldering temperatures.... and Lithium doesn't like to get too hot.
Solder tags/wires are spotwelded on by manufacturers, pretty much instantaneously and with hardly any heat input to the cell.
You could buy a battery holder for CR2032 to which you could solder the wires from your original plug.
In CMOS backup application the batteries last so long it doesn't seem worthwhile going to that much trouble though.

 

Thanks, trouble is I have a number of old laptops with missing or dead and dieing CMOS battery's so I would like to get them going with out warning notices or date changes. The battery holder sounds like a good move I shall look for a few and just put battery in different place, just have to find the plugs, both 2 and 3 spot. thanks.

 

Just looked on the auction site.
Search "cmos battery" gives 3,623 results. Mostly the plugs will be one of only a few types I think. "Panasonic cmos battery" gave 38 results - the few said to be for Toughbooks looked about 3 times the price of the rest...

 

You can use any watch battery , as long as the voltage is the same. I dont solder cmos batteries, i just put some plastic tape around it and then re-fit it. Works as a charm.

 

Put my orders in for battery's and holders works out about .50cents a battery set. though still have to get the plugs. Have some thin shrink tubes I will use to finish off. Thought about tape, after all Apollo 13 got back safe using Duct tape. Wounder who thought about putting that on board as a repair item, "Red Green" from Canada no doupt.

The Red Green Show Red customizes a car - YouTube

 

I walked into a Batteries Plus store 5 years ago with my CF17 battery and a sad, puppy dog look. The counter guy soldered a new 2032 on the existing holder/leash. Still working fine. It's doable.

 

Having only the vaguest idea of cell chemistry I may be overcautious on this.
I habitually soldered to batteries when I repaired cameras for a living.
Some current health issues may or may not be linked but I wouldn't do it today - especially when alternatives are available and cheap.