Gaps in your fitness tracking can be really annoying, but everything needs charging at some stage. This Fitbit Inspire 3 has a whopping 10 day battery life, which means no downtime in your tracking for over a week. Even when you're asleep, your Fitbit is monitoring your heart rate, blood oxygen, skin temperature and more, for a well-rounded view of your health. With a daily sleep score, you'll be able to tell how well you're resting too, which means you can improve your health from all angles. Good to know - See how you're handling stress with the daily personalised stress management score - If your heart rate rises or falls beneath the usual range, you'll get a notification - You'll be able to check for any irregular heart rhythms that can be signs of atrial fibrillation - Track steps, distance and calories, and see how long you're staying in the active zone - Choose from 20 exercise modes, and SmartTrack starts tracking automatically - The water-resistant band means you don't need to worry about getting caught in the rain