It is memorable that Apple dropped the performance of the old iPhone.
Since an iPhone’s old battery causes shut down, Apple dared to drop the performance of it when updating.
Apple was criticized by users and has reduced the battery replacement cost by 60%.
Then, about 11 million batteries have been exchanged in one year.
As a result of old iPhone’s lifetime has increased, the sales of new iPhone has decreased.
The mills of God grind slowly but they grind exceedingly small.