It is often seen in documentaries like Animal World that some people shoot or track animals with animal cameras or animal collars. What power supply does he use? ...

For example, hidden type and installed type are generally battery-powered, but what kind of dynamic tracking system is there? If no creatures pass by, they won't start and are in a standby state.

In addition, the staff also need to come back to see if there is any record. If not, they may consider changing to a more likely location.