For a long time, smartwatches lived in the shadows and were hardly successful with their short battery life. Last year, Huami watches in particular changed this, by lasting up to three weeks without recharging. An exception from the beginning is the Apple Watch, which is not long-lasting in terms of battery runtime but is extendable. We compare current models and point out what you should look out for.
https://www.notebookcheck.net/The-best-smartwatches-of-2020-in-our-review.484859.0.html
What about Garmin
The simple fact that you left out Amazfit's T-Rex Smartwatch says a lot. With a ruggedness second to none, even Casio's vaunted GShock series, and a standard 20 DAY battery life makes it definitely better than all of those watches listed. Sure those may have more apps, but in USEFUL functions, the T-Rex has enough to do what I need! The battery life, customizable faces, and toughness put the T-Rex above just about all other smart watches!
Is it only me or the table does have duplicated "Waterproof" and a"Water proof" column 🤔