Whoah, can you source that? If that number is even remotely true the thing is completely useless as a handheld due to requiring 2-3 extra batteries for any longish trip.
On the other hand, I think it could be a nice touch to give the customer an option to buy a case/battery combo, designed by the same manufacturer.
Likewise if it wasn't built in but came with the product, i'd be wanting a lower priced product not including the external battery.
Nintendo having an history of using proprietary cable, this is great news. Having the possibility to charge all of your device with one cable and sharing a unique powerbank is something really cool.
> Battery life can last for more than six hours, but will vary depending on the software and usage conditions.
> For example, The Legend of Zelda™: Breath of the Wild can be played for roughly 3 hours on a single charge.
[1] https://www.engadget.com/2016/12/27/you-wont-be-able-to-upgr...