The new addition of handheld boost on the Nintendo Switch 2 is great for when you are playing original Nintendo Switch games as the system acts as if you are playing in docked mode, bringing with it improved resolution and framerate but as several videos have attested it can effect the battery life. One Reddit user noticed that playing Doom (2019) on the Nintendo Switch 2 with handheld boost on give them three hours and 43 minutes as opposed to 5 hours and 5 minutes with handheld boost turned off. So if you are playing while traveling etc it might be worth bearing this in mind. You have to manually turn on handheld boost if you want it and it can be found in settings.