Android 9 Pie vs Android 8.0 Oreo Walkthrough: What’s New

Battery Status Info

Most versions of Android show some sort of information about the battery. When you head to settings > battery > you'll see a list of running apps, remaining battery life, and a few other things. 

In Android 9, Google added a dedicated area with a green check-mark, stating that your battery is in good shape. This is likely a response to Apple's battery woes and device throttling. Basically, if your battery starts to show signs of wear and tear after a few years, Android will let you know. 

It's a small but potentially helpful feature that could explain problems with your device later down the road.