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6
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Last Post
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May 8, 2007 10:56 PM
by: Imagine
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Posts:
291
Registered:
Jan 31, 2004
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No Batteries Available message...
Posted:
May 5, 2007 11:43 AM
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Hi,
My battery indicator on the menu bar specifies "No Batteries Available" when there is a battery in the PowerBook G4.
It'll go between No Batteries Available and Calculating....until full.
Is this a sign of a dying battery or faulty computer? I've had the battery for nearly two years. Also when I press the button on the battery, all the little green lights appear.
Thanks.
Mac Pro 2.66 / 5GB Ram
Mac OS X (10.4.8)
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Posts:
4,485
Registered:
May 21, 2005
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Re: No Batteries Available message...
Posted:
May 5, 2007 7:01 PM
in response to: Imagine
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How many cycles do you have on your battery and what does it show for it's full charge capacity? Click blue apple, about this mac, more info, and power, see battery information.
You might try resetting your power management unit (PMU), per this Apple note: http://docs.info.apple.com/article.html?artnum=14449
PB G4 1.67ghz 2gb; mini G4 1.5ghz 1gb
Mac OS X (10.4.9)
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Posts:
144
Registered:
Jan 11, 2006
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Re: No Batteries Available message...
Posted:
May 6, 2007 12:28 AM
in response to: Imagine
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In Terminal use the following to evaluate battery:
ioreg -wo -l|grep Capacity. It will show cycle count, absolute maximum capacity, present capacity and current charge.
PowerBook G4
Mac OS X (10.4.9)
1.25GHz/PPC G4/768RAM/80GB-36unused
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Posts:
291
Registered:
Jan 31, 2004
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Re: No Batteries Available message...
Posted:
May 6, 2007 12:31 PM
in response to: garrett5
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Thank you for the information. Using both methods, here's the battery info.
Is it time for a new battery?
Thanks!
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4228
Remaining Capacity (mAh): 4019
Amperage (mA): 0
Voltage (mV): 12288
Cycle Count: 313
IOBatteryInfo" = ({"Capacity"=4228,"Amperage"=0,"Cycle Count"=313,"Current"=4019,"Voltage"=12287,"Flags"=1090519045,"AbsoluteMaxCapacity"=4400})
\ | | | | "IOBatteryInfo" = ({"Capacity"=4228,"Amperage"=0,"Cycle Count"=313,"Current"=4019,"Voltage"=12287,"Flags"=1090519045,"AbsoluteMaxCapacity"=4400})
MacBook 2.0
Mac OS X (10.4.9)
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Posts:
291
Registered:
Jan 31, 2004
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Re: No Batteries Available message...
Posted:
May 8, 2007 1:57 AM
in response to: Imagine
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Anyone know if my battery needs to be changed?
Thanks
Mac Pro 2.66 / MacBook 2.0
Mac OS X (10.4.9)
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Posts:
4,485
Registered:
May 21, 2005
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Re: No Batteries Available message...
Posted:
May 8, 2007 9:06 PM
in response to: Imagine
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So here's the odd thing .... Apple says that a properly maintained battery should retain 80% of it's charge after 300 cycles. Yours has more cycles, yet the capacity is not far off a new battery. I'd expect to see a capacity around 3500 or lower with your cycle count.
One of the characteristics of a dying lithium battery are odd counts in the battery status, ie, battery capacity might show 22530 versus approx. 4400 for a new battery. Your counts aren't wacky like that, but they are suspect. Usually, a failing battery will also get to a certain point, and the battery power will unexpectedly drop to zero - I don't recall you mentioning that as an issue too.
PB G4 1.67ghz 2gb; mini G4 1.5ghz 1gb
Mac OS X (10.4.9)
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Posts:
291
Registered:
Jan 31, 2004
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Re: No Batteries Available message...
Posted:
May 8, 2007 10:56 PM
in response to: BGreg
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I'm seeing a lot of "No Batteries Available and Calculating....until full".
I really don't know what to make of it.
Mac Pro 2.66 / MacBook 2.0
Mac OS X (10.4.9)
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