5 minute battery life
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29-09-2020 - |
質問
I have a Late 2011 Mac Book Pro 15" and recently the battery has very quickly gone from several hours of battery life to all of a sudden only apparently having 5-10 minutes
and by quickly I mean over the course of just a few weeks..
What i want to know is is this the End of life for my battery or is it malfunctioning and need a battery reset
If this a battery reset issue how do I do this on a mac I used to do this in the BIOS when I owned a PC Laptop but no idea how to do this with a Mac Book since there isn't one
Is this something that can be done through AHT?
Battery Information:
Model Information:
Serial Number: D86130308TRDGDLAW
Manufacturer: SMP
Device Name: bq20z451
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 406
Hardware Revision: 2
Cell Revision: 158
Charge Information:
Charge Remaining (mAh): 156
Fully Charged: Yes
Charging: No
Full Charge Capacity (mAh): 156
Health Information:
Cycle Count: 358
Condition: Service Battery
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 11896
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Wake on AC Change: No
Wake on Clamshell Open: Yes
Wake on LAN: Yes
Current Power Source: Yes
Display Sleep Uses Dim: Yes
GPUSwitch: 2
PrioritizeNetworkReachabilityOverSleep: 0
Standby Delay: 4200
Standby Enabled: 0
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake on AC Change: No
Wake on Clamshell Open: Yes
Display Sleep Uses Dim: Yes
GPUSwitch: 2
Reduce Brightness: Yes
Standby Delay: 4200
Standby Enabled: 0
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
ID: 0x0100
Wattage (W): 85
Revision: 0x0000
Family: 0x0085
Serial Number: 0x0058432a
Charging: No
解決
Possibly your battery has developed a phenomenon called internal temporary short or known as Whisker.
A whisker is a deposits growth inside the batter between the positive and negative pole consisting of Lithium crystals.
Eventually this deposit shorts the poles leading to battery life time shortage and erratic behavior.
There is not much you can do about that other than getting a new battery.
Sources: http://batteryuniversity.com/learn/article/sulfation_and_how_to_prevent_it/
http://www.sciencedaily.com/releases/2012/12/121204194246.htm
https://web.ornl.gov/ccsd_registrations/battery/abstracts/abstract.pdf
In summary:
Because of those internal whiskers your battery does not hold the charge any longer.
他のヒント
While I can't explain the rapid loss in battery life, the best way to determine the battery health would be through the system profiler. There are instructions on how to check the battery cycle count on a Mac here: http://support.apple.com/kb/HT1519
Along with benchmarks for healthy cycle counts.
For what it's worth, my 15" MacBook Pro needed a replacement battery a few months ago. Although the decline in battery life was a little bit more prolonged.
Option + Click on the battery percentage in the menu bar. this will show the condition of the battery.