Hi @Boz51. For any hardwiring that you do on the Ring Video Doorbell 2, you will still need the battery in the device. Without a battery, hardwiring support, which is to give the battery a trickle charge, will be unable to do so without a battery present. Please note too that even with excessive activity and battery drainage, if the trickle charge does not provide enough of a charge over the usage on the battery, there still may be times down the road that you need to remove the battery to charge just that physical battery. Hope this helps!