Battery Life
 

Good day to you and a happy new year. I hope 2019 treats you well.
Anyway. I am going away for an extended period and I need to keep the battery charged. I know about trickle chargers etc. my question is:
f I disconnect my battery on my 2006 A Avant do I mess up the electronics and need professional help to get the thing started again?
Thank you for any helpful comments :)