I've heard that battery life is about on par with a standard Switch, since in reality its just a Switch with the Joycons bolted on and some minor features removed.

I personally love the flexibility of the Switch. I can play Zelda on the big TV in the living room, while my wife can play some Stardew Valley in bed. Its really the best of both worlds, unless you absolutely need HDR/60fps/4k resolution to enjoy gaming.