Having had some experience with this miserable set-up, it is not worth having. This rechargeable system for hearing aids is just far too unreliable.
You will find this on some hearing aids from 2017 and 2018:
OTICON Opn (original version)
WIDEX Beyond and Evoke
RESOUND LiNX 3D
Avoid is our advice. All credit to Phonak for not venturing down this route. It will be dumped as a power method quite soon.
Lithium ion is the only answer (Phonak Marvel, Oticon Opn S, Sivantos Signia Styletto, Starkey Livio AI, etc.)
MR, 6 6 19