You mean one + and one - wire, right? I had a computer with a battery like that before, they're annoying. I'm pretty sure the amount of power in the battery, and the low amount of power PCs use in general, means nothing will get fried, but I would wait for someone who knows to before trying it.
I'd rather not ask the... not obivous, but very easy, but did you look at the plug? Two of the holes (I don't think there's a technical term) may be blocked, so that you can only connect it one way. Also, if there are only two wires, the two holes that go with them are the ones you should connect, and if there are four, then it should be the black and red wires (traditional for positive [+] and negative [-]).
good luck

Only first and last pins are used to connect battery, the two center pins are unused

StickByDos wrote:

Only first and last pins are used to connect battery, the two center pins are unused

On most boards, yes.
Just a matter of finding out the polarity.

@Amigaz: Got a multimeter? If not, it's time to get one now, after all you own a lot of retro hardware... 😉
A cheap one (~10 $ ) will do for most purposes.

general_vagueness wrote:

You mean one + and one - wire, right? I had a computer with a battery like that before, they're annoying. I'm pretty sure the amount of power in the battery, and the low amount of power PCs use in general, means nothing will get fried, but I would wait for someone who knows to before trying it.
I'd rather not ask the... not obivous, but very easy, but did you look at the plug? Two of the holes (I don't think there's a technical term) may be blocked, so that you can only connect it one way. Also, if there are only two wires, the two holes that go with them are the ones you should connect, and if there are four, then it should be the black and red wires (traditional for positive [+] and negative [-]).
good luck

Yeah, one is blocked but there's four pins on the CMOS batt. connector 😜

StickByDos wrote:

Only first and last pins are used to connect battery, the two center pins are unused

One of the centerpin holes in the battery connector is blocked

5u3 wrote:

On most boards, yes. Just a matter of finding out the polarity. […]
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StickByDos wrote:

Only first and last pins are used to connect battery, the two center pins are unused

On most boards, yes.
Just a matter of finding out the polarity.

@Amigaz: Got a multimeter? If not, it's time to get one now, after all you own a lot of retro hardware... 😉
A cheap one (~10 $ ) will do for most purposes.

hehe, I actually own a very expensive Fluke multimeter I use alot for trouble shooting car engines and marine engines

But how will it help me find out which two pins to connect too? I have 50/50 chance to connect it right since the + and - wires are next to each other on the battery connector which doesn't make sense if pin 1 + 4 are + & -? 🤣
Maybe the seller just threw in this battery and it doesn't belong to this motherboard 😜

One pin of the cmos battery (black) is on ground.

This is how it looks, sorry for the crap photo...my photo skills are zero 😁

As you see one hole is blocked (white dot) and + and - are next to each other

h-a-l-9000 wrote:

One pin of the cmos battery (black) is on ground.

Yes, and red is positive...I use to work as a boat engine mechanic so I'm familiar with those facts 😉

well then it should be easy to find out which pin on the board is ground (with the multimeter).

The link in your first message is broken.

Amigaz wrote:

One of the centerpin holes in the battery connector is blocked

I have a mobo where the pin 2 is missing

Amigaz wrote:

This is how it looks, sorry for the crap photo...my photo skills are zero 😁

As you see one hole is blocked (white dot) and + and - are next to each other

that's good enough to see how it's set up
if there's a pin missing, then of course that's where the blocked spot goes, otherwise it still will only plug in one of two ways, and I think I remember once plugging mine in backwards and not having anything fry because of it (caution, though)