Hi,
Good day, please check the device configuration.
Kindly check if you have configured the device correctly according to On Stop and On moved mode
FMC130 Data acquisition settings - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)
Make sure that you set the correct source for the ignition/movement
FMC003 System settings - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)
If the ignition or movement source is not properly configured or fixed then there is a chance that the device will stay working even if the vehicle is off.
You can also enable the sleep mode to save the battery of the vehicle:
Sleep mode wiki:
FMB003 System settings - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)
For the sleep mode to work properly please make sure that the movement and ignition source is properly configured and set.
Best Regards
Maynard C