Turn Your Old Apple Watch Into a Dedicated Sleep Tracker

While the newest Apple Watch Series 11 can provide up to 8 hours of battery life with a quick 15-minute charge, that may still not be enough to last you through the entire day. And if you use your Apple Watch at night to track your vitals, you might have a hard time having enough power while you’re out and about.

Luckily, if you have an older Apple Watch, you can turn it into a dedicated sleep tracker. You’ll still get all the benefits of any Apple Watch, meaning you’ll get to see your sleep quality, your heart rate, and — depending on your Apple Watch — even your blood oxygen levels and potential hypertension risks, without compromising your main Apple Watch’s battery life.