Garmin Enduro 4
It lists 80 h in Activity Mode (Normal) and 36 days as a smartwatch, both without solar. The screen is a 280 x 280 memory-in-pixel panel on a 51 mm case, and no smaller size is on this page.
What the maker states
| Smartwatch battery | 36 days, Without solar |
|---|---|
| Weight | 66 g, With band; case only 57 g |
| Case size | 51 mm |
| Water rating | 10 ATM |
| Display | Transflective memory-in-pixel, 1.4 in, 280 x 280 |
| Satellite systems | GPS, GLONASS, Galileo, QZSS, BeiDou, multi-band |
| Heart rate sensor | Garmin wrist optical heart rate sensor |
| External sensors | ANT+, Bluetooth |
| Training metrics | Training Readiness, Training Status, VO2 Max, lactate threshold, Endurance Score, Hill Score |
| App | Garmin Connect |