The conversation on this page has been archived and is no longer active.

PB 12" G4 battery shelf life

Message #1 - Posted 2006/09/02 - Keith Wiley

Sorry this is long, but it is rather entertaining, if somewhat ironic.

I bought my PB in April 2005, not quite a year and a half ago. By the beginning of this summer, the battery was pretty dismal, so I got a new battery directly from Apple. That was about six weeks ago and I have been very pleased with the replacement.

Now Apple has recalled my original battery's serial number, but not the replacement's serial number, so they're going to send me a brand new battery for free.

But I can't return the replacement because you have to do that within forteen days of purchase.

So, basically, I completely wasted my money on this recent replacement and I doubt Apple will let me return it, so now I'm wondering how long the soon-to-be-received recall replacement will last if I just leave it in a box with the intention of taking it out as my next battery replacement sometime next year when my current battery (that is, my second battery on this computer, the one I just bought a few weeks ago) dies.

Clearly, it won't *hold a charge* more than a few months. I don't care about that. I want to know if it will still be able to *take* a charge after that much time? If so, will its capacity be half ruined by then, effectively nullifying the battery's usefulness as a replacement?

Can these batteries (li-ion I believe) be stored more effectively in a refrigerator or freezer? If so, does that only prolong stored charge (which I am not interested in) or does it also prolong lifetime capacity (which would be useful to me)?

Does anyone have any reccomendations what I should do in my situation, that being that I will soon have two batteries that are at virtually the same point in their life cycles, one being about two months ahead of the other?

Anyone want to buy a perfectly good battery for, say, $100?

Needless to say, I'm kind of annoyed by the situation.

Thanks. Cheers!

________________________________________________________________________ Keith Wiley kwiley@cs.unm.edu http://www.unm.edu/~keithw

"Yet mark his perfect self-contentment, and hence learn his lesson, that to be self-contented is to be vile and ignorant, and that to aspire is better than to be blindly and impotently happy." -- Edwin A. Abbott, Flatland ________________________________________________________________________

Message #2 - Posted 2006/09/02 - Elliott Roper

Previously, Keith Wiley wrote:

<snip>

Does anyone have any reccomendations what I should do in my situation, that being that I will soon have two batteries that are at virtually the same point in their life cycles, one being about two months ahead of the other?

Use them both. There is nothing more satisfying than smugly watching PC owners scrabbling for power sockets after a few minutes operation. Now you can have double the fun.

You will double the useful lifespan of both batteries, since their life is measured in charge cycles rather than years.

To de-mung my e-mail address:- fsnospam$elliott$$
PGP Fingerprint: 1A96 3CF7 637F 896B C810 E199 7E5C A9E4 8E59 E248

Message #3 - Posted 2006/09/02 - Marc Heusser

Previously, Elliott Roper wrote:

You will double the useful lifespan of both batteries, since their life is measured in charge cycles rather than years.

Li batteries have a shelf life, typically 3 years starting with the manufacturing date. It does not matter that much how many times you have charged them.

HTH

Marc

Switzerland/Europe
<http://www.heusser.com> remove CHEERS and from MERCIAL to get valid e-mail

Message #4 - Posted 2006/09/02 - John Johnson

Previously, Elliott Roper wrote:

Previously, Keith Wiley wrote:

<snip>

Does anyone have any reccomendations what I should do in my situation, that being that I will soon have two batteries that are at virtually the same point in their life cycles, one being about two months ahead of the other?

Use them both. There is nothing more satisfying than smugly watching PC owners scrabbling for power sockets after a few minutes operation. Now you can have double the fun.

Absolutely do this. I've got two batteries for my PB for exactly this reason. Of course, one of those batteries is now on the recall list, so I've only got one battery at the moment (and have to haul around the wall plug). Even if there are wall plugs available, being tethered to one is often inconvenient, and having a cord lying on the floor can be a hazard.

You will double the useful lifespan of both batteries, since their life is measured in charge cycles rather than years.

As Marc Heusser pointed out, Li-ion batteries degrade with age, independently of cycles. That degradation is typically quoted as 2-3 years shelf life (stored at 1/2 charge, in a cool, dry environment...so _not_ a refrigerator!). They'll still work after more storage than that, but you'll start to notice capacity reduction.

Later,
John

johajohn@indianahoosiers.edu

'indiana' is a 'nolnn' and 'hoosier' is a 'solkk'. Indiana doesn't solkk.

Need Help? Have a Question?

Looking for more help, comments, and answers?

Ask your questions on Ask Different. Ask Different is a community of Apple users ready to help.