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The Edge 840 Solar is Garmin's mid-tier GPS cycling computer, sitting between the button-only Edge 530 and the larger Edge 1040. It combines a 2.6-inch color touchscreen with physical buttons, so it works with gloves or in rain, and adds Power Glass solar charging that Garmin says extends battery life by up to 25 minutes per hour in battery saver mode. Multi-band GNSS improves position accuracy under tree cover and in cities, and adaptive coaching builds daily suggested workouts around your training load and recovery. Riders rate it highly for reliability and battery life; the main complaints are the small screen for map reading and the learning curve of the menus.
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Owners and reviewers praise the Edge 840 Solar as a dependable, accurate computer with strong battery life and useful coaching. Most criticism centers on the small display for navigation and the time needed to learn the interface.
The Garmin Edge 840 Solar is a compact GPS cycling computer with both a touchscreen and buttons. It offers adaptive coaching, daily suggested workouts, and event goals where you pick a race distance and time goal. Stamina insights show how much you have left while you ride.
Power Glass solar charging extends battery life. Battery life is up to 60 hours in battery saver mode or up to 32 hours in intense mode. Solar charging adds up to 25 minutes per hour in battery saver mode on daytime rides. Multi-band GNSS improves positioning accuracy.
For navigation, it has preloaded Garmin Cycle Map with worldwide MTB trail data from Trailforks. It gives turn-by-turn directions and alerts, ride-specific routing for mountain, gravel or road, and Trendline popularity routing. Back to Start helps you return if you are lost or want to go home early. ClimbPro shows remaining ascent and grade on every ride, with no course needed.
