I always use the power adaptor for my macbook and I have never noticed it affecting the battery life. I’m pretty sure that newer batteries such as those in Macbooks don’t have any “charging memory”-bugs(not sure if it’s called that in english) or mechanical “wear and tear” that old rechargeable batteries used to have.
Also, a friend once told me that the processor of most laptops are slower when the power supply isn’t plugged in, which scared me into never unplugging my power supply. If anyone has any idea on whether this is true or not I’m very curious to hear it!
.
