Wireless Mains Adapter-Frequency etc.?

[Yorkie]

Interestiing! I'd understood the term 'wireless' to mean 'transmitted and received RF power', but in fact it's not RF coupled - it's two inductors closely coupled, rather like the mutual inductance of the primary and secondary of a transformer. (I didn't pick up how that AC is then rectified to DC to charge the cells). I'll watch developments with interest!