The battery life of both the Fitbit Versa 4 and Sense 2 is generally similar, with both devices capable of lasting around six days on a single charge under typical usage conditions[1][4]. However, this duration can vary based on specific features used, such as GPS tracking or always-on display, which can significantly reduce battery life[3][6].
During sleep tracking, both devices are efficient since they do not require continuous GPS or always-on display. The Versa 4 and Sense 2 can track various health metrics overnight, including sleep stages, breathing rate, heart rate variability, and skin temperature variation[1][3]. These features do not significantly impact battery life, as they are designed to be low-power.
The main factors affecting battery life during sleep tracking are not the tracking features themselves but rather other settings such as notifications and screen wake settings. For example, if notifications are set to wake the screen, this could slightly increase power consumption compared to having notifications disabled or set to silent mode.
In general, both the Versa 4 and Sense 2 offer excellent battery life for sleep tracking, allowing users to monitor their sleep patterns without needing to recharge the device daily. However, if other power-intensive features like GPS are used during the day, the overall battery life may be shorter[3][6].
It's worth noting that some users have reported issues with sleep tracking accuracy on the Versa 4, but this does not directly relate to battery life[5][7]. Overall, both devices provide robust battery performance suitable for sleep tracking and other health monitoring features.
Citations:[1] https://www.pcmag.com/reviews/fitbit-versa-4
[2] https://community.fitbit.com/t5/Sense-2/Battery-usage-stats/td-p/5250486
[3] https://connectthewatts.com/2022/10/03/fitbit-versa-4-review/
[4] https://www.businessinsider.com/guides/tech/fitbit-sense-2-vs-versa-4
[5] https://www.reddit.com/r/smartwatch/comments/16mus6g/sleep_tracking_on_versa_4/
[6] https://www.zdnet.com/article/a-month-with-fitbits-sense-2-and-versa-4-good-health-and-fitness-features-but-beware-gps-use/
[7] https://community.fitbit.com/t5/Versa-4/Versa-4-isn-t-tracking-my-sleep-data/td-p/5371853
[8] https://www.youtube.com/watch?v=HQ4wGFMb0Aw