13 MacBook Pro Battery Life

[baconmacNcheese]

Is there a website where I can go to to reference where the battery capacity should be based on age/and load cycles?

My current capacity is at 92% for 19 cycle loads and my MBP is 6 weeks old. I just want to gauge if its "normal" or what have you. Thanks in advance.

 

[DivineEvil]

It's not normal. Calibrate it!

Mine is 98%, 64 charge cycles, 4 months old.

 

[kryptonianjorel]

Its not really "at" 92%, but that is what your computer thinks. Chances are it just needs a good calibration and you'll be all set

 

[baconmacNcheese]

I had just calibrated it.

I had it plugged in for more than two hours.
Used my laptop on battery power until it died.
Let it rest for about 9 hours.
Plugged it in and 92% showed up.

I'm using the coconutBattery app. Should I be concerned?

 

[fabian9]

Is there a website where I can go to to reference where the battery capacity should be based on age/and load cycles?

My current capacity is at 92% for 19 cycle loads and my MBP is 6 weeks old. I just want to gauge if its "normal" or what have you. Thanks in advance.

Strange - I'm on 100% health after 116 cycles...

 

[LAS.mac]

Mine is as old as yours, 6 weeks. I've 16 load cycles. and battery is 100% of capacity.
I'd calibrate it again...

 

[Richard1028]

Mine went down to 85% after a calibration and I knew that wasn't right so I calibrated again - no change, it was still at 85%.

So, over the next couple of weeks I would just run off battery power until the mac said I had about an hour left and then plugged the magsafe back in. Almost immediately istat nano said I was at 87%.

I've been doing this procedure at random (never letting the battery go dry before plugging in) for about 2 weeks now.

I'm up to 95% health now after 82 cycles. Oddly enough, this problem only started with Snow Leopard. (I was at 100% under 10.5.8).

 

[baconmacNcheese]

Mine went down to 85% after a calibration and I knew that wasn't right so I calibrated again - no change, it was still at 85%.

So, over the next couple of weeks I would just run off battery power until the mac said I had about an hour left and then plugged the magsafe back in. Almost immediately istat nano said I was at 87%.

I've been doing this procedure at random (never letting the battery go dry before plugging in) for about 2 weeks now.

I'm up to 95% health now after 82 cycles. Oddly enough, this problem only started with Snow Leopard. (I was at 100% under 10.5.8).

I'm taking you advice, and so far, the capacity went down... I'm running SL, is this a SL bug?

 

[baconmacNcheese]

Mine went down to 85% after a calibration and I knew that wasn't right so I calibrated again - no change, it was still at 85%.

So, over the next couple of weeks I would just run off battery power until the mac said I had about an hour left and then plugged the magsafe back in. Almost immediately istat nano said I was at 87%.

I've been doing this procedure at random (never letting the battery go dry before plugging in) for about 2 weeks now.

I'm up to 95% health now after 82 cycles. Oddly enough, this problem only started with Snow Leopard. (I was at 100% under 10.5.8).

I've been doing this for a week now and there has been no improvement. It stays between 92%-94%... What do I do now? Should I contact Apple?

 

[MBHockey]

Did you try resetting the SMC?

 

[miles01110]

Apple's not really going to tell you anything useful. The only way you'll have a case for a replacement or even cause for worry is if it starts dipping below 80% with under 300 cycles. Definitely shouldn't happen on the unibodies.

 

[mrsir2009]

That's not normal, you should calibrate it.