Last month I installed 4 C410 kits around my house (4 different sides of my house). They functioned very well until I noticed yesterday they all went offline, on the same day.

The battery usage and time of use show very high levels in last 4 days, despite no changes in activity. They are all facing house exterior - garden and small path - only used by me. As there is winter with low sun activity, most of the time it is dark outside.