Amazfit Active 2 vs Garmin Venu 4 45mm
Size, specs & wrist fit compared
Which one fits you
Under 16 cm (6.3 in) round, the Garmin Venu 4 45mm's lugs overhang and the Amazfit Active 2's do not; the Amazfit Active 2 fills the wrist at 16.5–18.5 cm, the Garmin Venu 4 45mm at 17–19 cm.
What else differs
- Screen: the Garmin Venu 4 45mm has the larger screen, 1.4 in across against 1.32 in on the Amazfit Active 2.
- Battery: 12 days for the Garmin Venu 4 45mm against 10 days for the Amazfit Active 2 in everyday use; 21 hours for the Amazfit Active 2 against 20 hours for the Garmin Venu 4 45mm with GPS on.
- Only the Amazfit Active 2 has a sapphire lens; only the Garmin Venu 4 45mm has an ECG app.
2.6mm thinner, the Amazfit Active 2 is the one that slides under a shirt cuff.
Among the 22 smartwatches 44mm across that we hold thickness for, the Amazfit Active 2 is thinner than 86%, so it wears flatter than its width suggests.
The Garmin Venu 4 45mm is 1.1mm wider and 2.6mm thicker than the Amazfit Active 2.
Amazfit
Active 2
Garmin
Venu 4 45mm
Amazfit Active 2 or Garmin Venu 4 45mm by wrist size
| Wrist round (mm left each side) | Amazfit Active 2≈50.5mm lug to lug, est. | Garmin Venu 4 45mm≈51.5mm lug to lug, est. |
|---|---|---|
| 14 cm / 5.5 in | Overhangs (2.7mm over) | Overhangs (3.2mm over) |
| 15 cm / 5.9 in | Overhangs (1.1mm over) | Overhangs (1.6mm over) |
| 16 cm / 6.3 in | Bold (0.6mm) | Bold (0.1mm) |
| 17 cm / 6.7 in | Sweet spot (2.2mm) | Sweet spot (1.7mm) |
| 18 cm / 7.1 in | Sweet spot (3.8mm) | Sweet spot (3.3mm) |
| 19 cm / 7.5 in | Balanced (5.4mm) | Balanced (4.9mm) |
| 20 cm / 7.9 in | Balanced (7mm) | Balanced (6.5mm) |
Switch or add watches
Amazfit
Active 2
Garmin
Venu 4 45mm
As an Amazon Associate, WatchFitTool earns from qualifying purchases.
Battery life compared
Furthest apart in Battery saver mode, where the Garmin Venu 4 45mm lasts 1.3× as long as the Amazfit Active 2 (25 days against 19 days).
Amazfit Active 2Garmin Venu 4 45mm
Battery saver
19 days25 daysSmartwatch
10 days12 daysGPS only
21 hours20 hoursAll systems
—19 hoursAll systems + multi-band
—17 hoursAll systems with music
—9 hoursAll systems + multi-band with music
—9 hours
More comparisons
2D Dimension Schematics
- Amazfit Active 2 43.9mm × ≈50.5mm (est.) · 9.9mm thick
- Garmin Venu 4 45mm 45mm × ≈51.5mm (est.) · 12.5mm thick
3D preview
Amazfit Active 2 vs Garmin Venu 4 45mm on a wrist
Specifications
The short version
5 key specs| Spec | AmazfitActive 2 | GarminVenu 4 45mm |
|---|---|---|
| Case Width | 43.9mm | 45mm |
| Thickness | 9.9mm | 12.5mm |
| Shape | Circular | Circular |
| Display type | OLED/AMOLED | AMOLED (optional always-on mode) |
| Released | 2025 | 2025 |