
Reddit users have noticed that Apple appears to be slowing down old iPhones that have low-capacity batteries. While many iPhone users have experienced perceived slowdowns due to iOS updates over the years, it appears that there’s now proof Apple is throttling processor speeds when a battery capacity deteriorates over time.
Here’s how you can check battery performance and usage : https://www.irepair.in/best-way-test-iphone-battery/
More info on Maximizing Battery Life and Lifespan : https://www.apple.com/batteries/maximizing-performance/
UPDATE!!! – Dec 28, 2017
Apple’s apology to the customers
UPDATE!!! – Jan 3, 2018
Apple’s battery replacement for iPhones in INDIA :