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.
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.
> 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...
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.