MBP 2012 Battery Calibration

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so let me straight, new macbook pro's not need calibrated when first open them?

when calibrate? once month?

i'm trying understand instruction calibrating later

for step 1 can computer used while charging full charge? know step 2 , 3 mention can used, i'm not sure step one.
 

you don't calibrate them @ all. built-in batteries in newer mac unibody notebooks come pre-calibrated , do not require regular calibration removable batteries. instructions quoted powerbooks , earlier mac notebooks. read link above information newer unibody notebooks.

should answer most, if not all, of battery questions:
 


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