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How long does the internal battery usually last?

8952 Views 6 Replies Latest reply: Jun 12, 2008 9:16 AM by Allan Jones RSS
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Jun 10, 2008 6:55 AM
I keep seeing posts about the date going back to 1969 so I'm wondering what timeframe am I looking at to replace the "watch" battery. I bought my PB back in '04. Thanks.
PowerBook G4 17", Mac OS X (10.5.3)
  • a brody Level 9 Level 9 (62,045 points)
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    Jun 10, 2008 7:39 AM (in response to BFA)
    Yep, 4 years is about right.

    It really depends on usage. Some don't see it come up till 5 years, but many do see it in their 4th year.
    MBP 15" 2.2 Ghz/iMac C2D 2.17/20 inch/iMac G5 1.8/A/iMac G4/Mac OS 9, Mac OS X (10.5.2), AppleTV, Samsung TXP-3064W HDTV, HP SJ 3970, Epson R220, Nokia 6085h/Time Capsul
  • Allan Jones Level 7 Level 7 (29,585 points)
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    Jun 10, 2008 10:06 AM (in response to BFA)
    Until recently, I thought the PB backup batteries simply ran down. While visiting the Apple Store in Portland OR a couple of weeks ago, I mentioned this to one of the techs and he said the PB battery was rechargeable like the ones in the older G3 PowerBooks.

    I was given a 2003-vintage PB17 recently that had been in storage (off power) for about six months. The backup would not support the time needed to change from battery to corded operation when running down the main battery. After having the PB on wall power for several weeks, I tried it again and the backup battery was able to allow the power switchover without the computer shutting down completely.

    Based on a sample size of n=1, the backup could be rechargeable. My big grip is that the batteries are hard to find and darned expensive. Too many offered online are sold as "used." If it's not rechargeable, what's the point of a used battery?

    Even rechargeable batteries have a finite lifespan so, if shopping for one online, get assurances that it is not used. I still have concerns about "new" batteries like this. If Apple has not made new parts recently, then those from inventory could be almost as old as the one you're replacing.
    PowerMac G4 MDD 1.25G SP;, Mac OS X (10.4.11), ; MacBook Pro C2D 2.2G 15" (10.5.3); PowerBook G4 1Ghz 17" (10.4.11)
  • a brody Level 9 Level 9 (62,045 points)
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    Jun 10, 2008 10:09 AM (in response to Allan Jones)
    Even unused batteries have a certain shelf life that depend entirely on the environmental conditions they are stored in.
    MBP 15" 2.2 Ghz/iMac C2D 2.17/20 inch/iMac G5 1.8/A/iMac G4/Mac OS 9, Mac OS X (10.5.2), AppleTV, Samsung TXP-3064W HDTV, HP SJ 3970, Epson R220, Nokia 6085h/Time Capsul
  • Allan Jones Level 7 Level 7 (29,585 points)
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    Jun 10, 2008 2:50 PM (in response to a brody)
    Even unused batteries have a certain shelf life that depend entirely on the environmental conditions they are stored in.


    Yup. I keep my stash of 3.6V PRAM batteries in a FoodSaver vacuum bag in the veggie drawer of the frig.

    AB, do you have any info on whether the PBook backup batteries are rechargeable or just regular Li batteries?
    PowerMac G4 MDD 1.25G SP;, Mac OS X (10.4.11), ; MacBook Pro C2D 2.2G 15" (10.5.3); PowerBook G4 1Ghz 17" (10.4.11)
  • a brody Level 9 Level 9 (62,045 points)
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    Jun 11, 2008 10:19 AM (in response to Allan Jones)
    Not directly. All I know is this article about backup batteries:

    http://docs.info.apple.com/article.html?artnum=86181
    MBP 15" 2.2 Ghz/iMac C2D 2.17/20 inch/iMac G5 1.8/A/iMac G4/Mac OS 9, Mac OS X (10.5.2), AppleTV, Samsung TXP-3064W HDTV, HP SJ 3970, Epson R220, Nokia 6085h/Time Capsul
  • Allan Jones Level 7 Level 7 (29,585 points)
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    Jun 12, 2008 9:16 AM (in response to a brody)
    I sent a feedback note suggesting that the article include info on which are rechargeable.
    PowerMac G4 MDD 1.25G SP;, Mac OS X (10.4.11), ; MacBook Pro C2D 2.2G 15" (10.5.3); PowerBook G4 1Ghz 17" (10.4.11)

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