Do you have any pictures of the battery in question?

The picture in my original post is one I took previously, but I'll take a new one at a closer angle shortly if it's too hard to tell how it's soldered on.

Edit: Much closer and clearer.

The battery itself should be easy to find, however its the contacts that I need to know about. Can they be reused?

My browser may have blocked it then. 🤣 I kind of run a tight security setup, and sometimes it overreacts. Do you have a link to the image in question?

https://pbs.twimg.com/media/BsygSKFCEAAICtc.jpg
Sorry 'bout that. It might be blocked because it's from a Twitter image link. Twitter sure is handy for quick photo uploading and hosting!

Yeah, taking a soldering iron close to a lithium primary cell would generally be a bad idea. If possible, I'd recommend using very thin snips (or flat-side cutters) to eat away at the side tab to remove the battery, then desolder the tab.

The BR-series of batteries is a slightly different chemistry from the more common CR-series. It has a slightly lower power density but the same voltage. You could replace the battery with a conventional CR2032 if you want.

I'd have to see what the underside of the board is like to see all the battery contacts but chances are pretty good you can find a proper battery holder that would fit right in there. Calipers might be necessary if you want to exactly match the footprint.

If you can't easily get a CR2032 holder you can replace it with a pair of AAs. Cut the battery away leaving some of the tab materials as Maeslin suggested, then solder the flying leads from a 2xAA battery holder to the remaining tab stubs, make sure you get the polarity right.

Such a holder can then be velcroed or zip-tied to the inside of the case.

Maeslin wrote:

Yeah, taking a soldering iron close to a lithium primary cell would generally be a bad idea. If possible, I'd recommend using very thin snips (or flat-side cutters) to eat away at the side tab to remove the battery, then desolder the tab.

The BR-series of batteries is a slightly different chemistry from the more common CR-series. It has a slightly lower power density but the same voltage. You could replace the battery with a conventional CR2032 if you want.

I'd have to see what the underside of the board is like to see all the battery contacts but chances are pretty good you can find a proper battery holder that would fit right in there. Calipers might be necessary if you want to exactly match the footprint.

Yeah, thanks for the info. I'd show the underside of the motherboard if it weren't for the fact that it was built in an L-shape (It's a horizontally-oriented computer case) and one of the screws has been stripped. My dad and I will give removing it another go later, he's just a little too busy right now. If the bottom is okay for a battery holder, though, that will make replacing the battery someday in the future far easier, so I'll post a picture as soon as we get the mobo removed.

Bump: My dad got the battery and contacs removed in one piece. Here's an image of the underside.

For good measure I took close-up pictures of the location the battery goes to as well as its underside area.

Would we be able to replace it with a standard holder?

EDIT: I finally got to a solution. I found the exact battery I needed for sale on a website. It has the exact same contacs soldered onto it. My dad soldered it into the motherboard and it works perfectly!