Battery health declining?

[Calsef]

I just got a MBP about two weeks ago. I've gone through about 9 charge cycles, and my battery health has been dropping much faster than I think it should. I've been using iStat pro and Coconut battery, and my battery health is already down to 96%. Is this normal? I have friends with over 30 cycles who still have 100% health, and I'm not doing anything weird in terms of charging or use.

Thanks for any help

 

[JSchwage]

Hmm, that's odd. My iStat Pro is showing 100% battery health with 33 cycles.

 

[pianoman]

read this. it might not answer your question directly, but it's good information to have. have you calibrated the battery at all?

 

[techguy40]

How come by battery shows 97% charged, health 100% and its fully charged and plug is in showing green? why its not showing 100% charged when fully charged?


I had the macbook pro for one week now and 4 cycles shows.

 

[Silent!Avenger]

4 cycles - 98% Health.
I'm using the newest Penryn edition of the MBP.
Used iStat Pro

 

[flopticalcube]

How come by battery shows 97% charged, health 100% and its fully charged and plug is in showing green? why its not showing 100% charged when fully charged?


I had the macbook pro for one week now and 4 cycles shows.

It won't start charging again until it reaches 95-96% charge.

 

[techguy40]

It won't start charging again until it reaches 95-96% charge.

Thanks


Is it better to have macbook pro plug in when near a plug?

What is a battery cycle? what causes me to already have 4 cycles in one week? How is it computed?


how many cycles will a macbook pro battery stop working?

 

[Silent!Avenger]

After many cycles, your battery will not be able to hold its charge as good. You might be able to get 2 or 3 hrs max, as opposed to over 5 hrs. Plugging it in is one way of stopping the wear of your battery. But keep in mind, as time goes on, your battery will 'naturally' become weaker. I plug my laptop in when Im near a socket, but I don't stress out too much about it. If worst comes worst, you can always buy a new battery. From experience, most of my batteries lasted 2 years before they needed replacement (they held less about 40-50% of their original charge). I would probably say I do about 250 cycles a year.