Even with all Apple's battery health tools the battery on your older iPhone 7 or iPhone 8 could probably still use a little more juice. There's no such thing as too much battery life, and a battery case can provide up to 20 hours of extra browsing, video watching and texting.
Since Optimized Battery Charging already comes enabled when you install iOS 13 or later, here's how to disable it. You can follow the sames steps to enable it if you decide you want to optimize your battery health. This is recommended for all devices, especially older devices.
With the launch of iOS 13, Apple has switched its focus from battery life to battery health. The new software includes a feature called, Optimized Battery Charging. OBC can be found in Settings > Battery > Battery Health, but it comes automatically enabled when iOS 13 is installed. The new battery feature reduces battery aging by learning your "daily charging routine" so your iPhone can wait to finish charging past 80 percent, for when you need it most.
Every time users flood the Apple support pages with a new iPhone issue, it's likely the episode will be referred to as one of the many "Gate" controversies named after the 70s Watergate scandal. Over the years, hardware and software glitches have been known as Antennagate, Chipgate, Hissgate and Bendgate. So what is Charge-Gate?
Apple introduced new battery health charts for the iPhone in iOS 12. The battery Usage and Activity charts can be found in the Battery section of the Settings app. The new tools are an extension of the Battery Health tools introduced iOS 11.3. iPhone users can now see their last charge level, and battery usage by apps broken down by the last 24 hours and last 10 days.