[Philpax]

That is also true of most smartphones. Smartphone batteries can be replaced, but specialty equipment and training is required. It's the same problem here, but much worse: they have to pack a significant amount of hardware into the space available. Even if they wanted to, it's unlikely that they could offer user-serviceable batteries.

[blackoil]

TWS are better comparison. Smartphone battery need to be changed in 3-5 years and should cost < $50. People throw them away because new one is better and they have money.