I and an acquaintance got identical Onn i3/4gb laptops (clearanced for 100usd). They left theirs plugged in constantly while I used the mechanism above. Three months later, theirs was suffering from spicy pillow, bad enough to rip the screw holders for the case, while mine is ok so far. I think the mechanism above is reasonable for shady hardware like the Onn laptop but I hope your Lenovo might do better.