These rugged fēnix multisport GPS watches let you add mapping, music, intelligent pace planning and more to your workouts — so you can take any challenge in stride. Battery life doesn’t limit you. Get up to 9 days between charges in smartwatch mode. Don’t just run harder. Run smarter with grade-adjusted pacing guidance. Run and ride. It’s what you do. Tracking all your stats it’s what we do. Internal, rechargeable lithium battery provides up to 9 days of battery life in smartwatch mode, 6 hours in GPS mode with music and up to 34 days in battery saver mode.