Scout's battery life in the real world depends primarily on three factors: The refresh rate, the reliability of cell connectivity and the movement of the device itself. Refresh rate is user-configurable from a few minutes to "never" (the “Locate Now” button on the app will still locate the device immediately at any time). Cell connectivity has an impact because Scout’s cellular module needs to transmit at a higher power level when the cell coverage is poor. And movement makes a difference because we use the onboard accelerometer to recognize if the Scout is at stand-still, in which case it stays in the lowest-power mode.
At shorter refresh rate intervals, in locations with only mediocrre cell connectivity, battery life may be as short as two days. At the longest of intervals, in areas with good connectivity, battery life can be 3-4 days.
Power management has been top of our list in the whole design process. We use lots of tricks to stretch the battery.