One thing about power consumption is that not every game hammers the system the same way even if the clocks are the same.
From my experience monitoring games on my V1, although MK8DX uses the same 460 MHz profile than Mortal Kombat 11, the former draws an avg of 5.8W (fan at 25%) while the latter stays at 6.8W (fan at 30%) [max brightness, max volume, wi-fi & BT off, joy-cons fully charged]
So, from my experience, the Switch isn't a 9W machine. I never saw this power consumption actually. MK11 is one of the most taxing games on Switch and I still get 2h21min.
So, with a 6.8W of power consumption, I imagine that the SoC is using ~4W. Now, if Drake has 4.2W (660 MHz) for the GPU and 2W for the CPU (~1.7GHz going by the Jetson Tool and cutting it in half for 4N), and 4W for the rest of the system (specially with the ~1.8" bigger screen compared with the V1), then we would have 10.2W. With have an increase of 50% in power consumption. We would need at least a 6465 mAh battery to have the same battery life (and this is all supposing that the 4.2W figure for the GPU is the max power draw at full usage)
I can't see Nintendo offering a worse battery life than the V1, and I also don't think they were happy with the more demanding games having ~2h25min of battery life. IF they could fit a 7500 mAh (3.7v) in there, that would help a bit.
Anyway, just napkin math to kill the time lol (not much happening today at the office)
-----------------------------------------------------------------------------------------------------------------------------------------------------
Talking about killing time (and napkin math), I just got my hands on a notebook from a coworker. When he told me it had a 4050 I had to ask to test it. And I did, with two games that shall not be named.
I set the TGP to 45W. Both games were using 98%~100% of the GPU. The average clock was at 2GHz. This GPU is 3 times bigger than Drake. I don't know if we can just divide by 3 to have an approximate idea of power consumption in a 12 SM GPU. I imagine the GDDR6 was drawing ~5W, so if we divide 40 by... 2.5 maybe? That's 16W for a constant 2GHz clock. I just thought it was interesting to share...
Also, that frame generation is another black magic from Nvidia. I couldn't tell the difference.