All ActiGraph activity monitors support a low-power mode (LPM) in which the device automatically reduces power during periods of sedentary activity. LPM is activated when the unit records no activity for 60 seconds (every 10 seconds for the GT3X+ product). The device’s power consumption in LPM is reduced significantly and can extend the battery charge life of the unit by approximately 15% if the unit is left untouched**. Upon entering LPM, the device will “wake up” every second (1000 milliseconds) and check for movement in the X and Y direction. If any movement is detected, LPM is switched off and the unit resumes normal operation. At this time, there is no way to disable this feature.
**15% battery charge life is subject to change based on firmware updates as improvements are constantly being made to enhance the battery life of the devices.