Same as nu11eaf, dealer kept saying battery charge low (needing overnight charging) and no fault found. Even said my 1 year mileage of 14 000 is low!
After my insistence of a proper diagnostic, the battery was found to be faulty. They tried to blame this on my DashCam causing severe drain.
Since the battery was changed, the SS has worked flawlessly.
I bought an ANCEL BM300 bluetooth battery monitor, just to reassure myself the DashCam was not causing a battery drain (it's permanently attached to the battery and works via bluetooth/phone app to give me readings of the battery Voltage) - its' not
There is large batch of faulty battery that does not show purely based on testing Voltage
Ancel Battery Monitor here