[PawgerZ]

Hearing aids already have replaceable batteries, don't they? I guess I don't know the whole market, but you can buy batteries for my brother's heading aids at Walmart. They take a minute or less to replace. Same with my friend's hearing aids.

[MandieD]

Hearing aids have long had tiny, replaceable batteries - rechargeable hearing aids are an innovation, by comparison!

[nikau]

rechargeable hearing aids are pretty common place now, although they still gouge you a few hundred dollars for the convenience.