Instead, the iPhone battery will charge to about 80%. With this prediction of daily behavior, Optimized Battery Charging prevents your phone from fully charging to 100% as soon as you plug it in. After a few weeks, it will learn that you consistently wake up and take your iPhone off charge at 8 AM, for example. The iPhone learns your daily routine and predicts how long the iPhone will be on the charger when you go to bed overnight. In iOS 13, Apple has introduced a new feature called ‘Optimized Battery Charging’. An aging battery may cause performance slowdowns and you will also notice that your iPhone may not last as long on a single charge, as the total effective battery capacity is less. They degrade due to the number of charge cycles and also how they are charged, such as how often they stay at 100% charge.Īs the battery degrades, their maximum capacity reduces. Lithium-ion batteries age over time and degrade.

After updating to iOS 13, you may have been wondering ‘why is my iPhone only charging to 80 percent?’ Here’s why…Īll iPhone models use lithium-ion batteries, like most mobile devices. Optimized Battery Charging changes the way in which your iPhone charges overnight in order to extend the lifetime of the battery. Apple is trying to make the battery in your iPhone last longer, so you can use your phone for longer periods of time without needing to get it serviced.