New MBP user here. I love the thing so far What effect does leaving the MBP plugged in after a full charge have? So far, I charge it fully, take it off the charger, and run it on battery almost all the way (til about 10%.) Then I plug it up again, and repeat. But this way I use about 2 cycles per day (I use my laptop a lot.) I want to start running it on the plug sometimes, so I don't burn through so many cycles so quickly. But how much "on the plug" use is too much? On Apple's site, it says: "For proper maintenance of a lithium-based battery, its important to keep the electrons in it moving occasionally. Apple does not recommend leaving your portable plugged in all the time. An ideal use would be a commuter who uses her notebook on the train, then plugs it in at the office to charge. This keeps the battery juices flowing." Does this mean I can leave it plugged in for the majority of the time I'm using it - as long as I run the battery a little as well, enough to make sure the electrons "get some exercise?" I'm really cautious about this battery stuff because I ruined my Dell laptop battery. I left it plugged in too much. Thanks in advance! Take care.