Macbook battery failure?

[nickg7]

Hi

I have an 18 month old Aluminium Macbook and when the battery level goes down to 30 - 40% it switches itself off / shuts down.
Could this just be battery failure and would Apple do anything about replacing the battery at all?
Any help / ideas please...many thanks, Nick

 

[spinnerlys]

What does Macintosh HD / Applications / Utilities / System Profiler > Hardware > Power say about your Battery Condition, Cycle Count, Charge Remaining and Full Charge Capacity?

 

[nickg7]

This is what it is right now...


Charge Information:
Charge remaining (mAh): 2105
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 2662
Health Information:
Cycle count: 365
Condition: Check Battery
Battery Installed: Yes
Amperage (mA): 378
Voltage (mV): 12488

 

[spinnerlys]

This is what it is right now...


Charge Information:
Charge remaining (mAh): 2105
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 2662
Health Information:
Cycle count: 365
Condition: Check Battery
Battery Installed: Yes
Amperage (mA): 378
Voltage (mV): 12488

You could try calibrating it once or twice and see, if the Check Battery message changes.

Apple Portable: Calibrating your computer's battery for best performance​

You could also try contact Apple, but as you have more than 300 cycles, you might be out of luck.