Once you break the seal on a battery pack they start to degrade, react with the air etc.
I seem to remember someone telling me about breaking the electrical seal on a battery, once you start it, it reacts away to its self at a low rate. Bit like a bottle of water, crack open the top and it will evaporate over time. I think its the conductivity of the moisture in the air maybe? On 28/07/07, David Mathog <[EMAIL PROTECTED]> wrote: > The question: what is the expected motherboard battery lifetime in > systems that are continuously on? > > Background: > > The question arises because it was necesary to cycle the power today > on a couple of nodes by unplugging them and then plugging them > back in again. When one came back up the BIOS settings were gone. > That wasn't evident until a keyboard and monitor were plugged in. > Losing BIOS settings when power is removed is pretty much the > classic symptom of a dead motherboard battery. > > These nodes are now about 5 years old, and that is about the average > battery lifetime in PCs that are turned off every night. However these > nodes have been on 99.99% of that time, so presumably the drain on the > battery should have been nil. Shelf life for motherboard batteries is > typically about 10 years. There is no info on how old the batteries were > that went into these systems, but presumably Tyan goes through a lot of > batteries and these were probably fresh when installed. > > So bottom line, is this just a freak event or would you expect the > other motherboard batteries to also die soon? > > Thanks, > > David Mathog > [EMAIL PROTECTED] > Manager, Sequence Analysis Facility, Biology Division, Caltech > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
