Mid09 Macbook Pro Defect Battery?

[sushimomo]

I've been using this macbook pro for less then a week.
The battery capacity seems to drop alot?

Anyone having this problem too?

 

[TheBritishBloke]

Coconut battery isn't 100% accurate. However if you're still in the 14day period after purchase, I'd still take it to apple for a replacement as they replace them 'no questions asked' within 14 days.

 

[Nautigar]

I have exactly the same problem. Battery Health was 100% when it arrived, 96% after the first charge cycle, and 92% after the second cycle. I am still undecided what to do about that.

Question to the original poster: Are you using the charger that came with the MBP (I think it is 60W), or did you use a more powerful charger (I think 80W) from the 15" models?

 

[sushimomo]

I have exactly the same problem. Battery Health was 100% when it arrived, 96% after the first charge cycle, and 92% after the second cycle. I am still undecided what to do about that.

Question to the original poster: Are you using the charger that came with the MBP (I think it is 60W), or did you use a more powerful charger (I think 80W) from the 15" models?

I am using the default charger that came with the macbook.

Right now my battery capacity is:


Btw i calibrated my battery already
Should i go down to the apple store to let them have a look?

 

[geoffreak]

Battery capacity fluctuates by as much as 10%. There is absolutely nothing wrong with your battery.

 

[onesmallmac]

Hey Guys, I have the exact same problem. Got my Macbook Pro 13" about 3 weeks ago...my battery came with approx. 5500 mAh and is now at 5301 with 10 charge cycles (according to istat nano and system profiler). I calibrated the battery right after I got it...seems the battery didn't like that. 😕

Thoughts anyone? I wonder how common this issue is...

Dan

 

[geoffreak]

Read my above post...

 

[onesmallmac]

I'm not a technician but I doubt that after proper calibration the battery capacity should fluctuate by 10%...mine does fluctuate between 96-97%

 

[iBookG4user]

If you're worried, go to system profiler and then to Power and check what it says under Health Information, specifically "Condition". Although I'd give it a bit longer to see if it stabilizes.

 

[geoffreak]

I'm not a technician but I doubt that after proper calibration the battery capacity should fluctuate by 10%...mine does fluctuate between 96-97%

The reason it does this is not because the battery is fluctuating, but the software that checks health isn't entirely accurate. Calibration will only set a rough "median" for the fluctuation.