If my MacBook is running, can i remove battery and later put it back?
closed as not a real question by bmike♦ Mar 11 at 16:21
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It's a little risky, but I have done it many times. I made sure that nothing can trip and accidentally unplug the MagSafe connector, then it was all good.
Your mileage may vary.
Disclaimer: I have a first-generation Unibody MacBook Pro 15", not a MacBook.
Yes, you can. As long as the power cord is connected, you can safely remove the battery. It won't affect anything.