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clock battery in G4 Mac Mini?

Message #1 - Posted 2006/03/19 - Sawney Beane

I downloaded the original version of the Mac Mini manual and found no reference to a clock battery. Is there one?

Message #2 - Posted 2006/03/20 - Hans Aberg

Previously, Sawney Beane wrote:

I downloaded the original version of the Mac Mini manual and found no reference to a clock battery. Is there one?

Why do you want to know that (yes, I think all Macs have a backup battery)? Which Mac OS version are you running? Mac OS 10.3 and earlier may have experienced backup-battery like problems, which in reality is not due to battery problems, but to the OS.

Hans Aberg

Message #3 - Posted 2006/03/20 - Sawney Beane

Hans Aberg wrote:

Previously, Sawney Beane wrote:

I downloaded the original version of the Mac Mini manual and found no reference to a clock battery. Is there one?

Why do you want to know that (yes, I think all Macs have a backup battery)? Which Mac OS version are you running? Mac OS 10.3 and earlier may have experienced backup-battery like problems, which in reality is not due to battery problems, but to the OS.

--
Hans Aberg

I keep my StarMax plugged in because otherwise the clock battery won't last long, and it won't start without that battery. I 'd like to know if I'll also have to keep a Mac Mini plugged in and if I'll have to send it away to have the battery replaced.

Message #4 - Posted 2006/03/20 - Hans Aberg

Previously, Sawney Beane wrote:

I keep my StarMax plugged in because otherwise the clock battery won't last long, and it won't start without that battery. I 'd like to know if I'll also have to keep a Mac Mini plugged in and if I'll have to send it away to have the battery replaced.

As far as I know, all Mac's have a backup battery for clock and some power management. I do not know how long it lasts, if the computer is turned off. At least days, weeks, perhaps longer, I would think. (Internet networked Mac's can be set so that thwy get their clocks adjusted via the net.) PowerBooks can even be run for a shorter time (some minute), so that one does not have to turn the computer off during a battery change. I do not recall any Mac that I have had, needing a battery change. I have encountered a few Mac's running Mac OS 10.0-10.3 (or something) that appeared in need of a battery change, but the problem disappeared after an upgrade to Mac OS 10.4. I got suspicious, because the batteries were sold put at Apple, but no Mac's under Mac OS 9 I encountered needed a battery change, including some older than five years. :-) So this suggested it was a OS problem, not a battery problem.

Why don't you check if the clock stays in place when you turn it off. If it does not, upgrade to Mac OS 10.4 before buying a battery.

Hans Aberg

Message #5 - Posted 2006/03/20 - Sawney Beane

Hans Aberg wrote:

Previously, Sawney Beane wrote:

I keep my StarMax plugged in because otherwise the clock battery won't last long, and it won't start without that battery. I 'd like to know if I'll also have to keep a Mac Mini plugged in and if I'll have to send it away to have the battery replaced.

As far as I know, all Mac's have a backup battery for clock and some power management. I do not know how long it lasts, if the computer is turned off. At least days, weeks, perhaps longer, I would think. (Internet networked Mac's can be set so that thwy get their clocks adjusted via the net.) PowerBooks can even be run for a shorter time (some minute), so that one does not have to turn the computer off during a battery change. I do not recall any Mac that I have had, needing a battery change. I have encountered a few Mac's running Mac OS 10.0-10.3 (or something) that appeared in need of a battery change, but the problem disappeared after an upgrade to Mac OS 10.4. I got suspicious, because the batteries were sold put at Apple, but no Mac's under Mac OS 9 I encountered needed a battery change, including some older than five years. :-) So this suggested it was a OS problem, not a battery problem.

Why don't you check if the clock stays in place when you turn it off. If it does not, upgrade to Mac OS 10.4 before buying a battery.

--
Hans Aberg

Now that I think of it, my StarMax was the first Mac where I heard the battery could be a problem. I replaced mine because of a consensus among owners that it would last only three years or so, and if the battery failed the computer wouldn't start.

My aunt bought an iMac that needed a new battery the day she brought it. I installed a new one. The manual said if the PMU button wasn't pressed, the battery wouldn't last long. I pressed the button, but the battery didn't last long. On that model, a dead battery was a minor inconvenience. It meant only that you had to reset the clock if you unplugged the computer.

If a Mac Mini clock uses very little current, like a wrist watch, maybe there's a sort of capacitor that keeps it running for a day or so if it's unplugged. I haven't received it yet, but it will have OS 10.4.

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