The previously set up camera starts automatically after a power interruption and reconnects. I can then re-establish a connection with the app. A special activation process is no longer necessary.
I have installed the Lumus at my home and on a factory site. It runs perfectly in summer and winter. I have no problems with the Wi-Fi connection. The image quality is good and the app functions are also highly recommended.
There is no option to install a battery with this product, but you could attach a powerbank (no guarantee). There are other battery versions from reolink that look the same without the light. I could not find this in the description.