Automatic grouping/degrouping with a battery

Hi everybody, I created a stereo pair of flex. One of them is battery equiped and is brought outside at sometimes. I have to delete the group and recreate it each time I want to use it separately. Should’nt it be possible to delete or suspend the fixed group when it is unplugged and re-create/re-activate it when it is plugged again? Should it make sense for anyone else? Let me know… Many thanks in advance, Pascal