http://time.com/4678629/nintendo-switch-first-impressions-hands-on/
As I feared in a previous post in this thread.
The only game I've been able to try so far is Breath of the Wild, and while I'm not allowed to write about it yet, I can say the battery while playing in handheld mode drains quickly, definitely near the 2.5 hour side of Switch's official 2.5 to 6 hour range. The system also seems to charge slowly while docked if you're simultaneously using it, a probable pain point if your play schedule doesn't involve breathers for the system to gulp down electricity.
As I feared in a previous post in this thread.