Garmin Fénix 8 AMOLED 47 mm vs Garmin Forerunner 165
Garmin Fénix 8 AMOLED 47 mm (47 h GPS, 59 g) vs Garmin Forerunner 165 (19 h GPS, 39 g). Side-by-side spec comparison: battery, weight, maps, multi-band GPS and price. Which GPS watch should you buy?
GarminGarmin Fénix 8 AMOLED 47 mmGarmin's flagship multisport watch: AMOLED display, topo maps, multi-band GPS, LED flashlight, speaker and microphone. 47 h in GPS mode (35 h multi-band) and 16 days in smartwatch mode. Rugged case with sapphire glass for mountain ultras and multi-day adventures.
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GarminGarmin Forerunner 165Entry-level running watch with a 1.2" AMOLED display, 19 h GPS battery and just 39 g. Training metrics, adaptive plans and accurate multi-GNSS GPS for training and racing marathons. Garmin's gateway watch for runners who don't need maps or multi-band.
View on AmazonSpec-by-spec comparison
| Spec | Garmin Fénix 8 AMOLED 47 mm | Garmin Forerunner 165 |
|---|---|---|
| GPS battery | 47 h | 19 h |
| Multi-band battery | 35 h | – |
| Smartwatch | 16 days | 11 days |
| Weight | 59 g | 39 g |
| Maps | ✓ | – |
| Multi-band | ✓ | – |
| Music | ✓ | – |
| Display | AMOLED | AMOLED |
| Price | Flagship | Entry |
GPS battery = each manufacturer's standard GPS mode; multi-band = dual-frequency (maximum accuracy). On Suunto, Polar Grit and Amazfit T-Rex the GPS figure already corresponds to dual-band mode. Figures verified against the manufacturer.
Verdict
For maximum autonomy on long ultras, Garmin Fénix 8 AMOLED 47 mm lasts longer in GPS mode. If you want the lightest watch on your wrist, go for Garmin Forerunner 165. Only Garmin Fénix 8 AMOLED 47 mm brings onboard topo maps for navigation. On budget, Garmin Forerunner 165 is the more affordable option.