The electronics industry is sleeping on the job, because they have not defined standard sizes for consumer grade lithium batteries (that means with an inbuilt protection circuit). All headphones, etc. should be using standard batteries.

I have just replaced a battery on my laptop, it completely failed after 2.5 years of use - they are a consumable, not a durable good. All headphones, gaming mice, etc. are headed straight for the landfill when their battery fails, it is impractical to replace that inbuilt lipo cell as it has custom size and shape, etc.

I buy devices with replaceable batteries whereever possible.