Battery Calibration Question

I don't you understand the concept of calibration. Google it.

use your MBP without the power source plugged in
use it until you have 10% remaining in your battery life
it will ask you to save your work because it's gonna go to sleep
keep using it until your mbp goes to sleep
plug your power source in and let it charge until the green light is lid.

 

It's OK if you restart you computer, but unless you need to, don't.

 

make sure that before you calibrate, you leave the computer plugged in fully charged for AT LEAST two hours. Then, like this says, use your computer normally until it goes to sleep. Once it's in sleep, leave the computer completely alone (don't plug back in) for at least 5 hours. Then, feel free to plug your computer back in and begin using it again hope this helps

 

http://support.apple.com/kb/ht1490

 

This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

 

If you read the link I posted, you'll know.

 

I just bought a mpb and didn't keep in fully charged for at least two hours. What is going to happen to my calibration? Can I recalibrate? What should i do?

 

You can calibrate again.

 

So should I plug the ac adaptor back in and fully charge it right now even though I'm in the middle of draining my battery?

Thanks.

 

You're wrong. You're supposed to leave it plugged in and fully charged for 2 hours, unplug it until it puts itself to sleep, leave unplugged for 5 hours, and then charge back up.

 

Recal every time you see your battery percentage stop going all the way to 100% when you're got your laptop charging.

 

Yes.

Wrong. Your battery will not always charge to 100%, even after calibration. It may charge to 97% or 99% and stop charging. It is not necessary or recommended to calibrate when this happens, and calibration will not make it charge to 100%.

 

Since I'm not an Apple engineer, I can only comment on my personal experiences and the one time it has happened and I re-calibrated it, it went back to 100%.

 

Calibration only makes your readings more accurate. It has zero effect on battery health, charge capacity, or charging.

 

I've always had it go to 100% too, but you never know man, I suppose there could be a time when it doesn't go all the way to 100%

 

There is no need to go out of the way to calibrate your battery. It will eventually calibrate itself as you use the machine normally, drain the battery completely and eventually recharge.

Calibrating on purpose wastes battery cycles.

The battery should always charge to 100%. The only exception is if you interrupt charging at over 97% or so; if you do the battery typically won't charge again until it's discharged below 97%.

A series of shallow discharges is better than deep discharges. Li-Ions don't have memory effect.

Have fun!

 

Wrong. Read the link I posted.

Wrong. The battery will not "calibrate itself". Calibration is more than simply draining and recharging the battery. Read the link I posted.

No, it doesn't waste cycles. There is a purpose for calibration. Read the link I posted.

Wrong. Read the link I posted.

 

Just get this app to help you calibrate your battery. Its free for 60 days and you can use all its features during that trial period after which it costs like 7$. I have it for some time and I love it!

Check out the screenshot: