The Fitbit Versa 4's battery consumption increases significantly when the always-on display feature is enabled. This feature allows the watch to continuously show the time, even when not actively being used, which requires more power and thus reduces battery life.
Without the always-on display, the Versa 4 can last almost a full week, typically up to six days, depending on other settings like screen brightness[2]. However, with the always-on display enabled, the battery life is reduced to about four days, assuming maximum screen brightness[2]. This reduction in battery life is because the display remains active, consuming more power compared to when it is turned off after a period of inactivity.
To manage battery life, users can disable the always-on display by swiping down from the clock face to access quick settings and tapping the always-on display icon to turn it off[3][6]. Additionally, adjusting other settings such as screen brightness can also help extend battery life[4][7]. The always-on display automatically turns off when the battery is critically low to conserve power[3][6].
Overall, while the always-on display provides convenience by keeping the time visible at all times, it comes at the cost of more frequent charging.
Citations:[1] https://www.youtube.com/watch?v=5uIVVNchMGs
[2] https://www.pcmag.com/reviews/fitbit-versa-4
[3] https://documents.4rgos.it/v1/static/1153729_R_D001
[4] https://www.youtube.com/watch?v=b4U6XdbuR-8
[5] https://www.youtube.com/watch?v=GLtuxZPjL9U
[6] https://media.croma.com/image/upload/v1686496760/Croma%20Assets/Communication/Wearable%20Devices/User%20Manual/263858_User%20Manual.pdf
[7] https://www.youtube.com/watch?v=9awokIgkW1g
[8] https://www.reddit.com/r/fitbit/comments/10wbyds/fitbit_versa_4_doesnt_change_brightness/
[9] https://support.google.com/fitbit/answer/14226518?hl=en