As smartphones replaced feature phones, battery endurance went in the gutter. And even after so many years, a day of between charges is what most people get - at least the people that don't want to live with battery anxiety. However the data proves that battery tech has progressed greatly. In fact, it won't be wrong to describe a modern smartphone as a battery with a screen and motherboard tacked on. We picked the Top 50 most popular phones from our database for each year and averaged the ratio of battery capacity to phone volume. In short, the chart below shows how many milliamp hours...
Source: https://www.gsmarena.com/counterclockwise_phone_batteries-news-28202.php
