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Lens: Corning® Gorilla® Glass

Battery Life: Smartwatch: Up to 18 days
Battery Saver Watch Mode: Up to 57 days
GPS Only: Up to 57 hours
All Satellite Systems: Up to 40 hours
All Satellite Systems + Music: Up to 10 hours
Max Battery GPS: Up to 136 hours
Expedition GPS: Up to 40 days