If your Apple Watch's battery is drained before your first cup of coffee in the morning, you may want to take a closer look at how the watch's power is being consumed. A likely culprit is the heart rate monitor which, while a great tool for wearers that need constant heart rate monitoring, may not be something you need to be activated if you have no history of heart issues. On the reverse, if you have concerns about fibrillation or other heart problems, you may want to capitalize on the Apple Watch's impressive cardiogram capabilities. 

How can you enable 'round-the-clock heartbeat monitoring on an Apple Watch? While Apple Watches don't continuously check heart rates, they can be programmed to read your pulse as often as every five seconds (in watches that can run at least WatchOS 6.2) using third-party apps like Cardiogram. By default, an Apple Watch will check your heart rate every 10 minutes, and store that information in your health app. The watch will scan even more frequently if you are working out, and in the minutes after a workout has been completed.

Battery life woes? Consider disabling heart rate monitoring to prolong your watch's battery life. This function can be easily toggled off and on in an iPhone's Watch app, so if you only want the watch's heart monitor on when you work out and sleep, for example, getting into the habit of turning it off and on is a great way to preserve battery during the day.

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