Question about Sony Xdr-V1btd

Hello Marianne
On mono: see also https://de.wikipedia.org/wiki...).
The unit has stereo speakers, the sound is "fuller" and gives a very good surround sound (for such a small cube).
About the battery: it lasts quite long, I've never measured it exactly, but it lasts at least 15 hours (if not more). That was the main criterion for buying this unit (no constant cable connection or battery operation).