I have the same headphones and that is not the only quirk thats driving me nuts. It doesn't remember the last noise canceling setting i used. I almost always use them at home so i don't need NC but every time I turn them on its in NC Mode and I have to press the button twice.

Maybe you have it set to autodetect the current setting. You can set presets for sitting/walking/in transit, and it dynamically switches between them.

Maybe that's a security feature, as you probably don't want the lithium battery to explode near your head.

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.

While I don't disagree the battery in them lasts forever. Charge them while you sleep.