McBook Air is not showing any battery in System Information

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McBook Air is not showing any battery in System Information

My McBook Air is not showing any battery all of a sudden. I am able to use the laptop without the power plugged in, so I assume the battery is providing the power but is not reported in "system information" below.

Also the fan is running continuously. I have already tried shutting down and starting up.

Battery Information:

Charge Information:

Charge Remaining (mAh): 0

Fully Charged: No

Charging: No

Full Charge Capacity (mAh): 0

Health Information:

Cycle Count: 0

Battery Installed: No

Amperage (mA): 0

Voltage (mV): 0

System Power Settings:

AC Power:

System Sleep Timer (Minutes): 10

Disk Sleep Timer (Minutes): 10

Display Sleep Timer (Minutes): 10

Sleep on Power Button: Yes

Automatic Restart on Power Loss: No

Wake on AC Change: No

Wake on Clamshell Open: Yes

Wake on LAN: Yes

Current Power Source: Yes

Display Sleep Uses Dim: Yes

PrioritizeNetworkReachabilityOverSleep: 0

Standby Delay: 4200

Standby Enabled: 1

Battery Power:

System Sleep Timer (Minutes): 10

Disk Sleep Timer (Minutes): 10

Display Sleep Timer (Minutes): 2

Sleep on Power Button: Yes

Wake on AC Change: No

Wake on Clamshell Open: Yes

Display Sleep Uses Dim: Yes

Reduce Brightness: Yes

Standby Delay: 4200

Standby Enabled: 1

Hardware Configuration:

UPS Installed: No

AC Charger Information:

Connected: Yes

Charging: No

MacBook Air (13-inch Mid 2011), OS X Mavericks (10.9.2)

Posted on Mar 16, 2014 3:39 PM

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Answer 1

Mar 16, 2014 3:49 PM in response to rajfrommd

run the Apple Hardware Test:

To run Apple Hardware Test remotely from another computer to a MacBook Air (Original), MacBook Air (Late 2008), or MacBook Air (Mid 2009):

Make sure to install Remote Install Mac OS X on the other computer.
Insert the Mac OS X Disc into the optical disc drive of the other computer.
- For Intel-based Apple computers shipping with Mac OS X v10.5.4 or earlier,AHT is located on the Mac OS X Install Disc 1 and should be included with your computer.
- For Intel-based Apple computers shipping with Mac OS X v10.5.5 or later, AHT is located on the Applications Install Disc 2 and should be included with your computer.
If your other computer is a Mac, open /Applications/Utilities/Remote Install Mac OS X. On Windows, choose "Remote Install Mac OS X" from the Install Assistant.
Read the introduction and hold down the Option key while you click Continue in Remote Install Mac OS X to launch AHT.
On your MacBook Air, when the AHT chooser screen appears, select the language for your location.
Press the Return key or click the right arrow button.
When the AHT main screen appears (after about 45 seconds), follow the onscreen instructions.
If AHT detects an issue, it displays an error code. Make a note of the error code before pursuing support options. If AHT doesn’t detect a hardware issue, the issue may be software related.
On the other computer, click Quit to exit Remote Install Mac OS X. If you see a message saying the MacBook Air will be disconnected, click Quit Anyway.

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