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> * Up to 30 hours of battery life on the 41mm (40 hours on the 45mm) with fast charging.

Is this a typo? I get 20 days on the Pebble Time 2.

It would be neat to see the power budget breakdown. I suspect power draw is primarily the oled display, with the "more difficult" health sensors being second.

For devices that are entirely controlled via an MCU and lack wireless connectivity, that is probably true. However that's not true for the pixel watch. The cpus and dram take significant power.

Here we go: https://feng-qian.github.io/paper/watchenergy_mobicom16.pdf

If you turn off cellular and WiFi (making it pebble equiv, but not gaining you weeks of battery), it's mostly display and CPU. I'm guessing a good portion of that CPU usage is display related. Pebble uses e-ink.

Maybe there's really that much more going on with Android?

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