Well before she didn ' t really have anyone collaborating her story . She did this time . It ' s a real shame that people are so short sighted to attack a victim . <| sep |> Liion batteries also degrade over time , so simply keeping it plugged in all the time so you don ' t use the battery doesn ' t make it last forever . Honestly , the battery and software technology do all the work for you . At this point , don ' t even worry about how you use it and just do as you please . If you still feel you need guidance , Apple published a good article about best practices performance My strategy for electronics with batteries is to buy usedold stock to avoid the premium of the new device , then sell around the 1218 month mark while the device still has 8090 % charge capacity . Then you avoid the last bit of life of a device and really only take a small hit in overall depreciation cost . BTW I think I have about 500 600 battery cycles on my SP 3 and it still runs an average of 7 hours on battery , so seriously , if you take care of your stuff there ' s really nothing to worry about .