After looking at the AirPods Pro teardown I noticed they're using a vastly different battery design than the regular AirPods. They use a button cell instead of a thin Li-Po battery.
I suspect this new battery will allow for greater longevity, as it could be a classic Lithium Ion design and not Lithium Polymer which has a lower service life. To give you an example, celphones use Li-Po batteries and you only get 2-3 years of life out of them, whereas my Norelco shaver uses classic Lithium Ion and is still nixing my face hairs at almost ten years old.
This is all speculation, of course, but... it would be nice for a $250 product to last at LEAST 6-8 years!
I suspect this new battery will allow for greater longevity, as it could be a classic Lithium Ion design and not Lithium Polymer which has a lower service life. To give you an example, celphones use Li-Po batteries and you only get 2-3 years of life out of them, whereas my Norelco shaver uses classic Lithium Ion and is still nixing my face hairs at almost ten years old.
This is all speculation, of course, but... it would be nice for a $250 product to last at LEAST 6-8 years!