6.4. Why has my clock stopped?
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This article is from the 3b1 computers FAQ, by John B. Bunch with numerous contributions by others.
6.4. Why has my clock stopped?
Your battery is dead. On the UNIX PC motherboard there is a 3.0 VDC lithium battery which keeps the real-time clock operating. Unfortunately, the battery is soldered to the motherboard in most cases. It's either the round cylindrical canister type, or more commonly the flat disc-shaped battery. A suitable replacement can be purchased at Radio Shack (BR-2325), but you'll need to get the disc battery holder. If you desolder the battery from the motherboard, solder in the holder, future replacement of this battery will be much simpler. If you are nervous about touching a soldering iron to your precious machine, ASCRC will do it for you (see above).
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