Although Nintendo recently released a Switch model with markedly improved battery life, longevity in handheld mode still isn’t great. Even with the new longer-lasting Switch you only get four and a half to nine hours of battery life. Those, of course, are the projected numbers and in our experience, we’re only able to play for a little bit longer than the minimum rated run time.
That’s hardly enough time to get through a good chunk of Astral Chain and you can forget about marathon sessions while on the go. If you want to boost your battery life and add a bit of protection to your handheld, a battery case is the way to go. In this list you’ll find the best Nintendo Switch battery cases, each offers a mix of tech you’ll need to ensure your handheld is always charged and ready to go.
Source: IGN.com These are the Best Battery Cases for the Nintendo Switch