LCfiner said:first, charge up the battery, remove it from the mac and place it on a kitchen scale.
record the weight.
then, put it back in the mac, deplete the battery fully (this can be done in around 45 minutes by viewing some flash videos).
once the battery is empty, take it out and weigh the battery again
record the new weight.
take the difference in weight between the fully charged and empty batteries and divide by the mAh capacity of the battery. now take this value and multiply by 100 and assign it to the z-axis.
this value is your calibration vector. write it down and keep it in your wallet
And you're done.
:lol