No. You don’t need to charge your Lenovo laptop after buying it. Lenovo already pre-charges their laptop as necessary, so you don’t have to charge it during the initial startup. By the time you have received your laptop and booted it up, it will be at around 40%. It doesn’t matter if you discharge or charge the battery 100%. Even if you overcharge it after 100%, nothing happens since the charge turns off at full battery. It’s recommended to charge it if you’re going to use it instantly for heavy work. Since if it overheats, the battery will get damaged.