The TSR PRO has multiple sleep levels that can be used to extend battery life.
In order for the TSR to be ready to record acceleration events, the accelerometers and all support circuitry must be fully powered. In this state with no sleep function enabled, a new primary battery (non-rechargeable) will last approximately 3 days. Run time can be extended by connecting an external battery, allowing operation of a week or longer.
Every TSR PRO has a built-in low g motion sensor that can be used to put the unit to sleep if it is expected to experience significant periods where it does not need to be awake and waiting for an event. When the unit is in “motion sleep”, the battery will last for months. If the motion sensor is enabled, the expected battery life then becomes a simple ratio of armed v. sleep time. For example, if a fresh battery gives 3 days of continuous “armed and ready” time, the motion sensor is enabled and the unit is stationary for 12 hours a day, battery life will be extended to approximately 6 days.
1) Mount a TRS PRO inside a shipping package armed without the motion sensor enabled. A fresh battery will last three days.
2) Do the same with the motion sensor enabled and the TSR will only wake-up armed and ready when the package experiences some movement. How long the recorder stays fully awake after motion stops can be set by parameters in the XML settings file. The important thing to note is that the TSR requires a short period (< 1 second) to come on and stabilize before it is truly ready to record an event. If the package is sitting on the floor for a period long enough for it to go to sleep and you walk up and kick it, the event will not be recorded.