The Switch battery is not user replaceable like the one in the Wii U GamePad — it’s built into Switch and sealed off from the user, just like most consumer electronics today.
However, should the battery fail or wear down, Nintendo will replace it for you, for a fee.
Nintendo revealed the option on the Switch website, where it listed some updated specs about the battery: the battery can last up to six hours, and that’s including when it’s charging the Joy-Con controllers.
And if the battery fails, the company writes:
”Please note: the internal battery cannot be removed. If the battery needs to be replaced, we plan to offer paid replacement via Nintendo Customer Support.”
Nintendo did not reveal what it will cost to replace the battery.
Of course, the battery life depends on the game the system runs — bigger games like Breath of the Wild will last less than six hours.