It’s time for Apple to face the music [again] when it comes to “throttlegate”, which came to a head nearly three years ago after it was determined that the company was throttling the performance of iPhones that had chemically aged past a certain threshold (usually around 80 percent or below original capacity).
Once Apple was caught red-handed,

Source: Hot Hardware – Apple Reaches 3 Million Settlement With U.S. States Over iPhone Throttlegate