The Track Box Passive has 3 detection modes which impact the read rates of antennas, data transmission and thus also have an impact on battery performance. 

Fast

In fast mode, the network modem stays connected permanently. The status of the box is updated every 15s and upload of passings is as fast as possible. This does not increase the read rate of the antennas but speeds up data communication. 

This mode will drain the battery faster and use more data, so should only be used if battery and data consumption are not a concern. 

A typical application for this would be a timing point for an announcer who requires the fastest data. 

Normal

Normal mode is the best compromise for general timing and recommended for most applications. In this mode, the GPS module is shut down if the box does not move and the device status will be updated every 4 minutes. 

In normal mode the antennas are reading 50 times per second, and passings will be uploaded in small chunks with smart processing to minimise delay and data consumption accordingly. If there is no data transmission pending then the modem will disconnect from the network.

Slow

Slow mode maximises battery life of the Track Box Passive whilst still reading transponders. In slow modex the read rate of antennas is reduced to 10 times per second, this is suitable for slow-moving, low density splits (only reading a few transponders simultaneously), and will also produce less accurate times. 

The data transmission and GPS module behaviour remains the same as normal mode for upload of passings and status. 

In slow mode, you can expect battery life of over 24 hours from a full charge.