White MacBook Battery Problem

[268144]

Right i've had my white macbook for a few months now, its at 91 cycles and 99% health...

this morning i turn it on and the health has dropped to 86% !?

any idea why this has happened, and if theres any way i can get it back up.

 

[doubleohseven]

You're considered lucky...some people have had their batteries on the same cycles as you and their battery is at 30%-40%. To get your battery up, try calibrating your battery every month or so. Also, if you're always running your MacBook off the power adaptor, let the battery drain every now and then.

Instructions on how to calibrate your battery can be found here.

 

[268144]

Thanks for the info! one of my friends has the same macbook and his battery is at 130+ cycles and his health is still at 100%.

hopefully i can get better performance outta mine, thanks for the info

 

[kastenbrust]

It needs to be calibrated every month for 2 reasons:

1) To ensure accurate health readings

2) To ensure maximum battery life

In your case i'd say its just a mistaken reading.
More info here on how to perform the calibration:

http://support.apple.com/kb/HT1490