Using the backup tool which can be downloaded following link below can help you with this.

https://www.deif.com/software/multi-line-2-backup-tool-software/
This tool enables you to create a backup of parameter settings, options installed and S/N (serial no., secure that data can only be used in correct unit)

OBS, this only works on older controllers with these software versions


for now to make back up on newer controller see 6.34.1 Memory in AGC-4 manual  

https://deif-cdn-umbraco.azureedge.net/media/plzjhgzq/agc-4-drh-4189340686-uk.pdf?rnd=132670138751830000&v=8


 For details about how to do the battery replacement see attached application note.