Hello Mike,
Good day. Thank you for your question.
My suggestion would be to enable your sleep mode. Currently, we have 4 different sleep modes (GPS Sleep, Deep Sleep, Online Deep Sleep, and Ultra Deep-Sleep mode) which you can refer to at our wiki page https://wiki.teltonika-gps.com/view/FMB204_Sleep_modes. In this link, you will find the condition to enter and exit the sleep modes.
The battery consumption during these sleep modes can be found here - https://wiki.teltonika-gps.com/view/FMB204_General_description#Technical_features
Also, please disable the use case scenario (eco/green driving, excessive idling, unplug detection, etc.) if it's not being used and the frequency of data acquisition to allow the device to remain in sleep mode longer thus stretching the battery life even longer.
Kindly go through this and let me know if it helps.
Best regards.
