Originally Posted by
jeremyBA
Interesting.
who chose 110 volts for a U.K. airline !
I only ever use usb but I assume most mains devices won’t work unless your adapter happens to have a wide voltage range
Probably designed that way to prevent passengers plugging in appliances more substantial than a phone or laptop charger (air fryer, Grorge Foreman grill etc).
Im pretty certain for medical need items such as that of the OP's there is a separate supply for them to connect to. I'd probably be inclined to raise this to the medical assistance team before travel rather than assume such medical devices will work on in-seat power.