I'm looking for something like the Relay G10 I have, or the Sennheiser XSW-D set, preferably with only one battery on the transmitter - meaning that the receiver end doesn't need battery and is a charging port (not a MUST, but preferrable).. I want a new set that can swap disposable batteries. If no disposable battery swap, I want a set that uses common batteriy standards that are easily swappable after some years. My Relay G10 lasted two years and it's now completely dead, and battery change is very difficult on this unit without any hazards and I have to bin it.. I want a new system that I can have for decades, and I don't want internal batteries to dictate it's logevity. Any good recommendations? I'm looking at the Sennheiser XSW-D now, but it has internal batteries unfortunately. Perhaps it's easily swappable down the road?