Earlier quoted context omitted.
No, it can charge while playing when using the official adapter. It's just that people were using low-rated battery packs. USB C can support up to 100W, the Switch charger is 45W, so if you're using a pack that doesn't output more than 10-20% of that, obviously you'll have slow charging and probably not enough to sustain playing and charging simultaneously. I'm not worried, I'm almost never away from power for more t…
Yah, you're right. Quoting from the review: "we’ve yet to find a battery / cable that can charge the console faster than it drains." So it's possible and likely that someone will make a capable pack at some point.
On the positive side, plugging a powerbank into the Switch causes the console to recharge faster than it depletes its own battery even in a stress test scenario with brightness and volume maxed. [1]
http://www.eurogamer.net/articles/digitalfoundry-2017-ninten...