A full battery charge lasted me exactly five days before it indicated that I needed to juice it up.Ĭharging is not a big deal with the Fitbit Charge 4. Through the one and a half weeks that I was able to use the Fitbit Charge 4, I left the 24-hour tracking feature active, used the Charge 4 at night for sleep tracking, and jogged or cycled once every two days with GPS tracking activated.

The Fitbit Charge 4 also fulfils the idea of always wearing a fitness tracker regardless of gender. This is a very important point considering how Xiaomi's Mi Band models boast of weeks of battery life are very popular - see our Xiaomi Mi Band 4 review. With smartwatches, frequent recharging is justified due to the increased functionality, but in fitness trackers, manufacturers should focus on keeping track of my vital signs with minimal power. In my eyes, it is critical if I have to connect the review unit to the charger every single day or even every two days for charging purposes. I want to record my everyday life and my regular running times as smoothly and seamlessly as possible. When I put a fitness tracker around my wrist for a review, I have a specific goal. Only Android device owners, however, can send quick replies from the wearable device.Here's where the Fitbit Charge 4 scores Battery life Receiving text notifications from your phone is also possible. You cannot make phone calls from the Charge 4, but you will get call and calendar alerts on the device. When you get home, you can see a map of your route through the Fitbit app. This makes it possible for the device to keep track of your real-time pace and distance when you're out and about without your phone. With the functionality, you can navigate between playlists, songs, and albums. The Charge 4 can control Spotify music from your nearby phone. Because of this, you can wear the tracker in the shower and pool. Like previous Charge devices, the Fitbit Charge 4 is swim-proof with water resistance up to 50 meters. Is it waterproof? Can I wear it while swimming?

In turn, you can see an estimate of your oxygen level variability in your bloodstream, which may indicate variations in your breathing during sleep.

With the built-in SpO2 sensor, the Charge 4 provides information that powers Fitbit's Estimated Oxygen Variation Graph in the Fitbit app. Product laydown photography for Fitbit Charge 4.

Charge 4 fitbit