Unfortunately, the firmware is stopped with 4.1.2, and even there have been fixes probably not yet. But that would be necessary because although the unit switches the monitor off after the specified time, then you need but continue as much electricity, that it then takes to eiinigen hours with 0% charge.
Also, it has just launched itself after a complete reinstallation just so new, and after waking from sleep mode and unlock the monitor I look now always only once in the camera image.