I hope it is still helpful - the following data I have determined on the day
- Charging time of completely empty: 2h45m
- Bluetooth range: 5m with wall cabinets and in between,> 10m at line of sight
- Runtime Standby (clock display): 38h
Distributed Fabled almost 21h, over 2 days and off in between: Runtime music playback via Bluetooth in volume 10 of 16 (that's significantly more than low volume) -.
A really perfect travel companion - it turns him completely when not in use, you can easily come about 2-3 days without recharging when used as Einschlafbeschallung and alarm clock well.