Garmin Forerunner 165 or Garmin D2 Mach 2? Complete Comparison

This is a detailed comparison of the Garmin Forerunner 165 and the Garmin D2 Mach 2. Garmin Forerunner 165's pixel density is 459 ppi, versus 458 ppi on the Garmin D2 Mach 2. The Garmin Forerunner 165 has a screen size of 1.2", while the Garmin D2 Mach 2 comes in at 1.4". Looking at internal storage, the Garmin Forerunner 165 offers 4GB compared to 32GB on the Garmin D2 Mach 2. For weight, the Garmin Forerunner 165 shows 39 g against the Garmin D2 Mach 2's 92 g. The Forerunner 165 has a 1.2-inch OLED AMOLED display with 390 x 390 px resolution and 459 ppi, while the D2 Mach 2 has a 1.4-inch OLED AMOLED display with 454 x 454 px resolution and 458 ppi. The Forerunner 165 weighs 39 g and is 11.6 mm thick, whereas the D2 Mach 2 weighs 92 g and is 14.7 mm thick. The Forerunner 165 is water resistant with a 5 ATM rating, while the D2 Mach 2 is waterproof with a 10 ATM rating. The Forerunner 165 offers 11 days of battery life and 19 hours with GPS on, compared with 26 days and 84 hours with GPS on for the D2 Mach 2. The Forerunner 165 has 4GB of internal storage and a 20 mm band width, while the D2 Mach 2 has 32GB of internal storage and a 26 mm band width. Timestamps: Design - 0:00:05 Sensors - 0:02:53 Activity tracking - 0:04:14 Connectivity - 0:06:41 Battery - 0:07:38 Features - 0:08:31 App & Software - 0:10:52