Should I store my collection with the PRAM battery installed?


macrumors regular
Original poster
Mar 17, 2010
Hi guys, I was wondering about this. The more I browse videos about oldes Macs, the more I see videos about damages caused by battery leakage.

I have more than 15 Macs in my collection, and was wondering if I should take out the PRAM batteries and only keed it in the ones I use..

Any thoughts??

Thank you guys in advance!!!


macrumors 6502a
Sep 16, 2007
As batteries generally go, removal is always best for safe storage. However, I've yet to see a Mac PRAM battery leak. Granted, I've not opened up machines that are more than 10-15 years old.

If easily removed, do it. If you have to tear it down, it's your choice.


macrumors 604
May 3, 2014
I've seen very few "G" era computers(barring obscure ones like the Kanga) with leaky battery. They're usually just dead.

With that said, I've seen a few with the red Maxwell batteries that are prone to leak.

With that said, the consequences of a leaking battery can be a dead computer. I have a Classic in my collection that's not economically repairable because of a battery leak.

So, I don't take chances. Few of the computers in my collection have PRAM batteries. My Mac II has batteries(new ones) because it must have working batteries to boot. A few of my G4s have CPU upgrades with patched firmware, and they have good batteries. Aside from that, I leave them out.


macrumors 6502
Oct 29, 2014
Oregon North Coast
If I don't expect to use it for several weeks, even months, at a time (or more) I will take them out if it doesn't require significant "surgery". I've never had a problem with a leaky PRAM battery in a Mac, but why take chances on the models where removing it is a very easy precaution?


macrumors 6502
Apr 6, 2016
Napoli, city of sun and pizza!
Does this affect mobile devices too? I have some phones, smartphones and an eBook reader I would like to keep for years and years... These devices have SOCs (system on a chip), so due to the dimension it would be much harder to do that.