In depth comparison and review of Garmin Forerunner 45S and Garmin Instinct 2. Compare sizes, functions, displays, batteries and other important specifications and features to easily choose the right smartwatch for you. Our goal is to help you uncover differences between the products and find the watch that will best fit your needs.
| GENERAL | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Product Type | Sport watch | Sport watch |
|---|---|---|
| Supported Host Device OS | iOS, Android | iOS, Android |
| Activity/Sport | - | Multisport |
| Wearing Style | Watch style | Watch style |
| Width | 39.5 mm | 45 mm |
| Height | 39.5 mm | 45 mm |
| Depth | 11.4 mm | 14.5 mm |
| Weight | 32 g | 52 g |
| Body Material | - | Fibre-reinforced polymer |
| Protection | Waterproof | Waterproof |
| Clock Display | Yes | Yes |
| FEATURES | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Sensors | Accelerometer, heart rate | Accelerometer, thermometre, barometric altimeter, electromagnetic compass, optical heart sensor |
|---|---|---|
| Tracking Data | Distance, time, speed, calories burned, sleep activity, heart rate, stress level | Distance, time, speed, calories burned, activity, sleep activity, heart rate, steps taken, floors climbed, blood oxygen saturation, stress level |
| Goal Setting | Yes | Yes |
| Features | Music remote handling, find phone function, HR zones, Move IQ, Garmin Connect compatible, Find my Device | Music remote handling, find phone function, VIRB control, inactivity alert, Find my Device, LiveTrack, Physio TrueUp, weather information, dual grid coordinates format, trackback routing, Body Battery Energy Monitor, accident detection |
| Notifications | Calendar, Email, social apps | Missed calls, calendar, SMS, Email, social apps, incoming calls |
| Vibrating Alert | Yes | Yes |
| Feedback Type | - | Vibration alert, visual interface |
| Navigation (GPS) | - | GPS/GLONASS/Galileo receiver |
| Payment Technology | - | Garmin Pay |
| CONNECTIVITY | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Wireless Interface | Bluetooth, ANT+ | Bluetooth, ANT+ |
|---|
| DISPLAY | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Type | Memory-in-Pixel LCD - colour - transflective | Memory-in-Pixel LCD - monochrome - transflective |
|---|---|---|
| Resolution | 208 x 208 pixels | 176 x 176 pixels |
| Screen Size | 1.04" | - |
| Dimensions (WxH) | - | 23 mm x 23 mm |
| Screen Protection | - | Chemically strengthened glass |
| INPUT DEVICE | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Type | - | Push buttons |
|---|
| CASE | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Case Size | - | 45 mm |
|---|---|---|
| Case Shape | Round | Round |
| Case Details | White | Iris | Black | Graphite | Electric lime |
| BAND | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Band Type | Band | Band |
|---|---|---|
| Band Size | S | - |
| Band Width | - | 22 mm |
| Fits Wrist with Circumference | 124-185 mm | 135-230 mm |
| Changeable | Yes | Yes |
| Clasp Type | Buckle | Buckle |
| Band Material | Silicone | Silicone |
| Band Colour | White | Iris | Black | - |
| STORAGE | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Storage Capacity | - | 32 MB |
|---|
| BATTERY | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Technology | - | Lithium Ion |
|---|---|---|
| Battery Life Details | GPS mode - up to 13 hour(s) Smartwatch mode - up to 7 days |
Smartwatch mode - up to 28 days Battery Saver Watch Mode - up to 65 days Max Battery GPS Mode - up to 70 hour(s) GPS mode - up to 30 hour(s) Expedition GPS Mode - up to 32 days |
| Rechargeable Battery | - | Yes |
| MISCELLANEOUS | Garmin Forerunner 45S | Garmin Instinct 2 |
|---|
| Included Accessories | Charging/data cable | Charging/data cable |
|---|---|---|
| Max Depth of Water Resistance | 50 m | 100 m |
| Max Operating Temperature | - | 60 °C |
| Min Operating Temperature | - | -20 °C |
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