VOGONS


First post, by alexparr

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Sorry to make another topic about this motherboard, but I've got a quick question about it and I don't want to derail the other thread, so...
I recently got a power supply for it and the system boots up! However the CMOS resets upon every power up, (I thought the power supply would keep it saved while it's plugged in but it doesn't, womp womp) so what I wanna know is this: what kind of battery (socket?) would fit in here?
I know I want a CR2032 socket in here, but the problem is finding the correct-length socket, and also making sure that it won't draw too much power from the poor CR2032. (I have no idea if a rechargeable barrel battery was previously installed or not)

Gateway 500S:
OEM Intel D845PT
Pentium 4 @ 1.80 GHz
256MB RAM
GeForce4 MX 440
SoundBlaster Live! CT4780
CAPS MAY HAVE FAILED, NEEDS MAINTENANCE

486 Project:
Jetway Motherboard
i486DX2 @ 66 MHz
8MB RAM
S3 Virge/DX
CURRENTLY OUT FOR REPAIRS

Reply 1 of 10, by debs3759

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It looks like it was designed to use either of two sizes of battery, so it's pretty flexible. You can use a CR2032 (or rechargeable equivalent). If you use a CR2032, or any other non-rechargeable battery, a lot of people recommend putting a diode in series with it, to prevent the battery from being damaged by the charging circuit.

See my graphics card database at www.gpuzoo.com
Constantly being worked on. Feel free to message me with any corrections or details of cards you would like me to research and add.

Reply 2 of 10, by alexparr

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debs3759 wrote on 2023-08-09, 21:42:

It looks like it was designed to use either of two sizes of battery, so it's pretty flexible. You can use a CR2032 (or rechargeable equivalent).

So if I buy a CR2032 socket and a rechargeable battery, it would work & recharge? Or do I have to buy specific socket/battery to make it happen?

Gateway 500S:
OEM Intel D845PT
Pentium 4 @ 1.80 GHz
256MB RAM
GeForce4 MX 440
SoundBlaster Live! CT4780
CAPS MAY HAVE FAILED, NEEDS MAINTENANCE

486 Project:
Jetway Motherboard
i486DX2 @ 66 MHz
8MB RAM
S3 Virge/DX
CURRENTLY OUT FOR REPAIRS

Reply 3 of 10, by debs3759

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A rechargeable battery such as an ML2032 will do the job. Same size as a CR2032 so the same socket. I can't check the distance between contacts on the socket, as most of my stuff is boxed up until carpets are fitted next week, but I'm sure they will work, even if it means bending the legs to fit.

See my graphics card database at www.gpuzoo.com
Constantly being worked on. Feel free to message me with any corrections or details of cards you would like me to research and add.

Reply 4 of 10, by debs3759

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I just checked, and LIR2032 is rechargeable as well. LIR2032 is 3.6V, ML2032 is 3.0V, so the LIR2032 is the best replacement for a Varta

See my graphics card database at www.gpuzoo.com
Constantly being worked on. Feel free to message me with any corrections or details of cards you would like me to research and add.

Reply 5 of 10, by jakethompson1

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I can't tell if that 3-pin header between the missing battery and the keyboard connector, above the middle capacitor in the cropped image given here, is an External Battery jumper or something else. If it's External Battery you can connect 4.5V 3xAA non-rechargeable battery pack across it.

Many solutions to this issue... there's even a drop-in replacement for the barrel battery with diode and everything, e.g.: https://github.com/scrapcomputing/BarrelBatteryBlaster

If you connect something with the voltage too low you may find that the board keeps its settings but the clock freezes in place with the power off. I find that with some boards I have, where 3V (CR2032) isn't enough but 4.5V (3xAA alkaline) is. The original barrel battery was 3.6V

Reply 6 of 10, by jakethompson1

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debs3759 wrote on 2023-08-10, 00:39:

A rechargeable battery such as an ML2032 will do the job. Same size as a CR2032 so the same socket. I can't check the distance between contacts on the socket, as most of my stuff is boxed up until carpets are fitted next week, but I'm sure they will work, even if it means bending the legs to fit.

Is it safe to just apply 5V across a ML2032 or LIR2032 as if it were NiCd? I thought lithium-ion required a more sophisticated charging circuit...

Reply 7 of 10, by alexparr

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jakethompson1 wrote on 2023-08-10, 01:16:

I can't tell if that 3-pin header between the missing battery and the keyboard connector, above the middle capacitor in the cropped image given here, is an External Battery jumper or something else.

If it helps, I uploaded a image of the full motherboard in another thread: download/file.php?id=170196&mode=view
Looking at it closer, it seems to have 4 pins; shouldn't an external battery jumper have 3 pins so you don't mix up the polarity?

jakethompson1 wrote on 2023-08-10, 01:16:

...there's even a drop-in replacement for the barrel battery with diode and everything...

Maybe if there was a way to mount it horizontally, as otherwise it might get in the way of the first PCI slot.

Gateway 500S:
OEM Intel D845PT
Pentium 4 @ 1.80 GHz
256MB RAM
GeForce4 MX 440
SoundBlaster Live! CT4780
CAPS MAY HAVE FAILED, NEEDS MAINTENANCE

486 Project:
Jetway Motherboard
i486DX2 @ 66 MHz
8MB RAM
S3 Virge/DX
CURRENTLY OUT FOR REPAIRS

Reply 8 of 10, by jakethompson1

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alexparr wrote on 2023-08-10, 02:43:
jakethompson1 wrote on 2023-08-10, 01:16:

I can't tell if that 3-pin header between the missing battery and the keyboard connector, above the middle capacitor in the cropped image given here, is an External Battery jumper or something else.

If it helps, I uploaded a image of the full motherboard in another thread: download/file.php?id=170196&mode=view
Looking at it closer, it seems to have 4 pins; shouldn't an external battery jumper have 3 pins so you don't mix up the polarity?

I'm talking about the one further down that currently has a jumper on it.
The 4-pin header is likely for a PS/2 mouse port.

Reply 9 of 10, by alexparr

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jakethompson1 wrote on 2023-08-10, 03:02:

I'm talking about the one further down that currently has a jumper on it.
The 4-pin header is likely for a PS/2 mouse port.

Hmm, it could very well be a PS/2 header. I'll have to look into that. Same goes for the one with a jumper on it; I'll check it out at some point later today.

Gateway 500S:
OEM Intel D845PT
Pentium 4 @ 1.80 GHz
256MB RAM
GeForce4 MX 440
SoundBlaster Live! CT4780
CAPS MAY HAVE FAILED, NEEDS MAINTENANCE

486 Project:
Jetway Motherboard
i486DX2 @ 66 MHz
8MB RAM
S3 Virge/DX
CURRENTLY OUT FOR REPAIRS

Reply 10 of 10, by alexparr

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Looking at the 3-pin header, I don't think that's meant for a battery. I don't know what it's for.

Gateway 500S:
OEM Intel D845PT
Pentium 4 @ 1.80 GHz
256MB RAM
GeForce4 MX 440
SoundBlaster Live! CT4780
CAPS MAY HAVE FAILED, NEEDS MAINTENANCE

486 Project:
Jetway Motherboard
i486DX2 @ 66 MHz
8MB RAM
S3 Virge/DX
CURRENTLY OUT FOR REPAIRS