Can I remove the battery form my MacBook Pro 13" when it is running on AC power? Isn't it charging and discharging decrease battery life? Is battery calibration needed when replacing?
MacBook Pro, OS X Mountain Lion (10.8.2)
If you've a MBP capable of running ML, then I'm assuming that you have a non-user replaceable battery so, no, I wouldn't advise trying to remove it under any circumstance.
Clinton
Yes, but you should not. If you do then you no longer have backup power in case of an outage. Your computer will also throttle down to half-power if no battery is present. Lastly, it doesn't do anything to prolong the battery's life.
About Batteries in Modern Apple Laptops
Apple - Batteries - Notebooks
Extending the Life of Your Laptop Battery
Apple - Batteries
MacBook and MacBook Pro- Mac reduces processor speed when battery is removed while operating from an A-C adaptor
Battery University
Apple - Batteries - iPod
Apple - Batteries - iPhone
Apple - Batteries - iPad
Apple Portables- Calibrating your computer's battery for best performance
Mac notebooks- Determining battery cycle count
How to Calibrate Your Mac, iPhone, or iPad Battery | MacBlend
Lastly, if the Mac should happen to be reasonably recent, the battery is not user replaceable and unplugging it will void whatever warranty may exist.
And if Kappy didn't scare you into not doing such a daft action, if the battery is not connected and power should fail while the drive is being written to, enough damage may occur that the entire contents be irretrievably lost.
Is removing battery in MacBook Pro 13" advisable?
