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Thread ID: 18995 2002-05-06 12:32:00 CMOS battery Guest (0) Press F1
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47456 2002-05-06 12:32:00 Hi all,

Anybody know where I can pick up a cheap CMOS battery for an old 486 motherboard? It's one of those awkward soldered on jobs: 3.6V 60mAh 14n 6mA Varta. I soldered on another old one but that proved to as flat as the original.

Thanks,
Rod.
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47457 2002-05-06 13:09:00 try dicksmith or jaycar.

failing that solder 3 nicads together. check that it is a nicad you are replacing. otherwise any battery at the right voltage you can wire in.
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47458 2002-05-07 02:02:00 Some boards with the soldered in rechargeable nicads also had a set of pins for plugging in an external battery, and a jumper to set. Its best just to snip off the old battery before it leaks onto the board, also easier to solder to if you do get a replacement.
An external battery can be made up cheaply by removing the disk battery holder from a junked PCI m/b and using a CR2032 battery from the Warehouse for about $4. A 4 pin plug like a PC speaker connector, can be used to connect to the board, checking polarity of course.
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47459 2002-05-07 04:16:00 Try Jaycar for a better price. If you're in Christchurch, South Island Components in St Asaph St. Guest (0)
47460 2002-05-07 12:41:00 Hi,

Thanks guys for your input. I appreciate it. However, it now looks as if the offending culprit is the CMOS memory itself as the battery I removed seems to have plenty of power in it? Go figure!

Cheers,
Rod.
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