Previous 1 2 Next 17 Replies Latest reply: Jul 15, 2009 10:17 AM by CeeZeeCZ
CeeZeeCZ Level 1 Level 1 (0 points)
Any help greatly appreciated.

New battery and trying to calibrate it. Turned PB off, installed new battery, plugged it in and fully charged it. Turned PB on, unplugged it and used it. I got the warning about the low battery message to plug into AC power or it would soon go to sleep. So, I kept on using it to force the sleep. Instead after a bit it simply shut down. No pulsing light. I charged it back up (overnight) and turned it on and when I go to 'More Info' in the Apple menu and look at the Power information I see:

Battery Information:

Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4544
Remaining Capacity (mAh): 4379
Amperage (mA): -1428
Voltage (mV): 12105
Cycle Count: 0

No first low level warning and no upping the cycle count. What should be my next step? I've heard about possibly resetting the PRAM, is this one of those times?

(BTW, I am able to put the PB to sleep when I select Sleep from the apple menu. That works fine.)

Message was edited by: CeeZeeCZ

PBook G4, Mac OS X (10.4.11)
  • BGreg Level 6 Level 6 (17,500 points)
    A Power Management Unit (PMU) reset may help: http://support.apple.com/kb/HT1431
  • CeeZeeCZ Level 1 Level 1 (0 points)
    BGreg, thanks for the suggestion with the link.

    I'm running the battery down again just to see if last time was a fluke (one can hope). If it still happens, after the recharge, I'll do the PMU reset.

    I don't think I'd removed the last battery in years! The battery I replaced was the original and had over 600 cycles on it. I'm pretty sure I was running 10.3 then. So it's gone to 10.4 and who knows what else happened.
  • kmac1036 Level 4 Level 4 (2,360 points)
    is this an genuine apple battery or a 3rd party? Only the apple ones will put the machine to sleep, any others will just abrupty shut the machine down.
  • CeeZeeCZ Level 1 Level 1 (0 points)
    It's a 3rd party. It's a Techfuel I got from BatteryHeads.

    How the heck do you calibrate it then?
  • CeeZeeCZ Level 1 Level 1 (0 points)
    I just checked the Power info in the 'about this mac' again. This is after I've been using the PB for an hour or so and the 'Cycle Count' has been updated but 'First low level warning' is still a No:

    Battery Information:

    Battery Installed: Yes
    First low level warning: No
    Full Charge Capacity (mAh): 4544
    Remaining Capacity (mAh): 2385
    Amperage (mA): -2004
    Voltage (mV): 11127
    Cycle Count: 1
  • kmac1036 Level 4 Level 4 (2,360 points)
    if you ran it dead already once, then the calibration is done. but the machine will just simply shut down if you completely run the battery out.
  • BGreg Level 6 Level 6 (17,500 points)
    'First low level warning' is still a No:


    The first low level warning doesn't mean has one ever been issued. It means has one been issued against the current battery status. When you empty the battery / recharge it, that resets to 'no'.
  • CeeZeeCZ Level 1 Level 1 (0 points)
    Thanks to you both for helping me understand what is going on with this new battery. It seems to be working correctly I guess. I can live with it shutting down instead of going to sleep. I never really get into that situation. I'd been doing the monthly calibration - do you think it is a good idea??

    I don't think I need to reset the PMU as it doesn't sound like it would help. So I'm just going to run it down a few times to give it a bit of a workout. It sure gets to the green light a whole lot quicker than my old one.
  • BGreg Level 6 Level 6 (17,500 points)
    2 to 3 deep discharges are enough for a lithium battery to be conditioned it's first time.
  • CeeZeeCZ Level 1 Level 1 (0 points)
    I'm just starting my third discharge so that should do it. I just unplugged it to let it run down and it's displaying 3:20 for time left. See how that goes, too. The brightness is on half but I do a lot of online work and I know that takes power. Of course, like everyone, I was hoping for more ....

    Do you do the monthly re-calibrate?
  • BGreg Level 6 Level 6 (17,500 points)
    I use my system enough that I deep discharge once or twice a month. In their note on batteries, Apple says whats important is to keep the electrons flowing, which means minimally a once a month deep discharge. You've probably read this note already: http://www.apple.com/batteries/notebooks.html. If I remember in your initial post, your battery had around 600 cycles on it, which is outstanding ... keep doing whatever you've been doing!
  • CeeZeeCZ Level 1 Level 1 (0 points)
    Yeah, it's only been the last few weeks that it really started dropping battery time drastically. It went from fairly okay to less than an hour in a very short period of time. So when I checked to see what the charge cycles number read (last count 638), I was amazed. Then in over about a week's time it dropped even more.

    The last couple of years I started doing the monthly deep discharges in a sporadic manner. I set up an iCal monthly alert but quite a few times it just wouldn't be convenient and I'd skip it for that month. But for the first three years I didn't do anything special.
  • eww Level 9 Level 9 (52,975 points)
    Only the apple ones will put the machine to sleep, any others will just abruptly shut the machine down.


    This has never been my experience. Since 1994, I've bought several third-party batteries for several different Powerbooks, and all have behaved properly vis-a-vis sleep on low battery. They've all been bought from reliable Mac-centric vendors and borne reputable brand names, and none cost less than $90. I've never owned a third-party battery that failed to trigger sleep as it neared full discharge, except when it was very old and tired.

    I have, however, seen many reports here of cheap third-party batteries picked up on Ebay, some of them bearing apparently counterfeit Apple labels, that failed to trigger sleep on low battery, provided false or impossible battery condition readouts, failed to charge, never gave any low-battery warnings, or otherwise misbehaved.

    You get what you pay for in Powerbook batteries.

    Message was edited by: eww
  • kmac1036 Level 4 Level 4 (2,360 points)
    I bought my macbook battery from a very apple centric vendor - it doesn't support it.
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