Comment by frowin

I think not. It keeps battery cycles low and is likely better than some other behavior. As far as I remember, batteries don't like to go way below 20% and don't like fast charging from 80% upwards. However, to my knowledge, it is wise to drain the battery 1-2 times a year so that the charging controller can calibrate. A way to do that is to type "yes" in your terminal (or 3-4 terminals) and wait, it will make the CPU run at 100%. After your MacBook shut off, leave it for some hours before you charge it again.