Customers should upgrade to the later OS version that throttles but Apple mentions nothing about it. Apple mentions nothing about battery needing to be changed if one doesn’t want throttling either. They hid a lot.
Did you even read what I linked?
The shutdowns solved by iOS 10.2.1 are reportedly caused by uneven power delivery from older batteries, which can trigger an emergency shutdown on an iPhone. Apple has tweaked its power management system to reduce shutdowns
...
A new battery info screen will also be added to iOS 10.2.1 in the next few days, letting customers who need to replace their battery know that it's not functioning as expected. The warning, which will be in the Battery section of the Settings app, will only be displayed to customers who need new batteries.
https://support.apple.com/en-us/HT207453
This doesn't fit the narrative developing, so I am sure you'll come back with some non-sense.