What is the purpose of the IQ range 9V battery and can it be removed?

The onboard 9V battery is used to maintain the display, update remote indication (relays) and maintain full functionality of the user interface. This enables commissioning, configuration and datalog analysis to be performed if power cannot be provided to the actuator. The battery is not required to maintain position sensing. All settings are held in a non-volatile EEPROM so the battery can be removed if necessary.