[matt4077]

The reason for glued-down batteries is not planned obsolesces. You can get the battery replaced for 150$, which is about as much as Lenovo's batteries cost.

The reason is that a removable battery needs twice as much enclosures as a non-removable one, adding something like 1/5 of an inch to the thickness. The second reason is that Apple has switched to shaped batteries basically filling any available space, which makes removability as good as impossible.

A third reason is that nobody actually wants removable batteries. An MBP gets 10 hours of battery life, 13 if you're on a plane and turn off the wireless. Add an hour of food service to it and you're good to go around the world.

If that's not enough, you can just get an external battery.

[closeparen]

All rechargeable batteries reach end of life and need replacement, usually before other components have gone out.

Swapping day-to-day isn't the use case, avoiding a day in the shop when it's time to replace the degraded battery is.