You can sit on the couch and have your laptop plugged in. I also don't keep my lenovo plugged in all the time and don't notice any battery issues. Realistically

You can sit on the couch and have your laptop plugged in. I also don't keep my lenovo plugged in all the time and don't notice any battery issues. Realistically you're not sitting on a couch, working for 6 hours straight either.