Second part is an elegant solution actually, an alert to indicate when the clock speed has been reduced because of battery degradation. Don't agree with first part though, non removable battery has certain uses - like thief cannot turn off the phone by removing the battery. Actually saw an instance where a lost iPhone was recovered because the person who found it did not know how to turn off the phone without removing the cover. It has been tried out for smartphones as well, just did not really work, like Moto G5 was modular, primarily for the ability to swap batteries, but it was not very practical, and the LG G6 dropped the approach.
Char limit hit
