Member
Join Date: Apr 2005
Location: St Evenage
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I've recently started having a problem with my MBP when running on battery power - it completely shuts down without warning when the charge falls to somewhere in the region of 20-25%. It used to be fine, and would shut down around 3% or less, and I'd get the warnings about being on reserve power just before it all went dark. Now, it works fine for a reasonable time on battery, then just dies .
Here's the info from System Profiler: Model Information: Serial Number: Sony-ASMB012-36ab-76ef Manufacturer: Sony Device name: ASMB012 Pack Lot Code: 0003 PCB Lot Code: 0000 Firmware Version: 102a Hardware Revision: 0500 Cell Revision: 0303 Charge Information: Charge remaining (mAh): 499 Fully charged: No Charging: Yes Full charge capacity (mAh): 3279 Health Information: Cycle count: 116 Battery health: Fair Battery Installed: Yes Amperage (mA): 1477 Voltage (mV): 12071 Any idea what could cause the battery to suddenly loose health like that? And if the MBP is still under warranty (I'd have to check that as I'm not sure), would I be able to get a replacement battery? Thanks, Dave. |
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Member
Join Date: Apr 2005
Location: St Evenage
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Some more information:
Just as a check, I removed the power supply when at about 18% charged, to see if it would shut down straight away again. It didn't shut down, so I reconnected the power supply, and the charge indicator immediately showed 41%, so I checked System Profiler again and saw this: Charge Information: Charge remaining (mAh): 1926 Fully charged: No Charging: Yes Full charge capacity (mAh): 4572 Health Information: Cycle count: 116 Battery health: Good Battery Installed: Yes Amperage (mA): 2261 Voltage (mV): 12226 Very odd! |
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Custom User Title
Join Date: Jul 2006
Location: At home
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I saw that happen on my brother in law MB. The problem was the battery connection. It would connect/disconnect when the laptop was moved or had pressure on it. With the power cord plugged, we could see the icon blinking from charging to no battery. So with no power cord plugged, it was a instant shut down.
It stopped by itself. Don't know what was causing the problem but we can't recreate it so... Dave Mustaine :"God created whammy bars for people who don't know how to solo." |
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Senior Member
Join Date: May 2004
Location: Chicago
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My PowerBook does this. I think (I don't remember if I heard this somewhere or if it is my own speculation) that the battery is made up of 4 or 5 cells, and some of them died, but the battery's circuitry can't detect that, so it'll run merrily along thinking it has plenty of power, then just die. Mine usually does it at about 45%.
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Member
Join Date: Apr 2005
Location: St Evenage
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Member
Join Date: May 2007
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Have you checked the information at the following page? Big question, is Battery Update 1.2 installed or not?
http://www.apple.com/support/exchang...acbookpro.html |
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Member
Join Date: Apr 2005
Location: St Evenage
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Yeah, all updates installed . I think it's time to book it in for a checkup at the local store .
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Veteran Member
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I had some problem and had Apple ship me a new battery which seems to be running fine now. . .
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Senior Member
Join Date: May 2004
Location: Chicago
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