Well then, I will take your word for it. (And I'm not Michael, I'm C D.) Most of my experiences with pram batteries were in the original candy colored (VW bug) style iMacs. When they got low enough, they would prevent the machine from booting, but as long as the machine was running, it would run perfectly with a low or even dead battery until you actually powered it off.
I had several cases of clients who never turned their machine all the way off, and never had a problem until they got powered down by a residential power outage, and then wouldn't start up again, because the battery was at absolute 0v. > On May 7, 2020, at 2:54 PM, Karl Kuehn <[email protected]> wrote: > > Michael, > With all due respect, you are wrong. A bad PRAM battery will cause > problems on a machine that is fully plugged in. They are often subtle and > non-repeatable (hence my procedure to diagnose involving over 48 hours), but > they do happen. In the past I have fixed problems this way, so I know that > this is the case. You may not have seen this, but that does not change things. > > — > Karl Kuehn > [email protected] > > > >> On May 7, 2020, at 2:40 PM, Macs R We <[email protected]> wrote: >> >> While this is true, even in the older systems a bad PRAM battery would cause >> mischief only when the machine was disconnected from all other power (for a >> laptop, that means adapterless and batteryless; for a desktop, that means >> unplugged or shut off with the power button, not slept). Otherwise, the Mac >> will always maintain power to those functions using the non-internal-battery >> power source. Unless you have a desktop, and unless you explicitly shut it >> down or have a home power failure, the PRAM battery (where present) will >> never come into play. >
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