Mac SE NVRAM battery removal

drlegendre . drlegendre at
Sun Nov 6 20:21:12 CST 2016


No - go ahead and remove. The battery retains the PRAM data, which is
generally not a user-accessible feature in the way CMOS RAM is on x86. The
PRAM will be restored on next boot - but obviously, some things (like
virtual memory) will need to be re-enabled. Not a big deal at all.

On Sun, Nov 6, 2016 at 8:12 PM, John Rollins <kd7bcy at> wrote:

> You just made me think that I need to go check on some of my stuff and see
> what the batteries are doing… Been quite a while since I used a lot of them.
> On an old Mac, quite often the reason for a machine to not boot at all
> would be a dead PRAM battery, so complete removal may not be an option. You
> could test it, but don’t expect much. As for what is stored in there
> besides date/time, a quick search shows that it is likely storing data on
> startup disk ID, AppleTalk status, monitor settings, volume, mouse speed,
> and energy saver settings.
> > On Nov 6, 2016, at 14:49 , Jules Richardson <
> jules.richardson99 at> wrote:
> >
> >
> > So I'm working my way (more slowly than I probably should be) through my
> systems, ditching ancient on-board batteries before they leak...
> >
> > In the case of the Mac SE's, are there any critical settings which I
> should make a note of before removing the on-board battery? Should I expect
> any issues trying to run the machines without? (I'm not inclined to replace
> batteries unless I have to, just so I don't have to worry about replacement
> again in x years time)
> >
> > cheers
> >
> > Jules
> >

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