C410 Solar kit has recently started using A LOT more battery with no change from me


I've made no change on my kit, and yet all of a sudden, the battery usage has skyrocketed and the camera is going completely flat.
Has there been any change to how these cameras work? It's made it go from an awesome setup to something that looks like it'll be unusable going forward.
In terms of detection, I have only an overnight detection set (via recording schedule being set from 9pm to 5am), and have had almost no recordings of detected events. Certainly no more so than previously. (Maybe a detected event once a week or so).
What could cause this huge of a change in battery usage?
