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It's official: Smartphones will need to have replaceable batteries by 2027
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
Chances are most companies aren't going to make two separate production lines with and without a removable battery. The cost likely outweighs the profit i'd wager. Much like how we see apple finally begrudgingly moving to USB-C despite no NA law requiring them to do so.
A different chip is a different scenario. We're talking about how the entire design, case etc has to accommodate for a removable battery.