iphone 8 plus power save/performance options

As we are all students in college, we are constantly busy with schools, activities, study sessions, etc. Our phones are being used for various reasons and that takes the battery right up. There are many ways in which you can save your phone’s battery power. These ways include avoiding extreme temperatures, update to the latest software, making sure the device is on a low power mode, and viewing battery usage information.
Avoiding extreme temperatures is very important because it can damage the battery capacity meaning when the device is plugged in, there will be no power given to it. Keeping the phone in a hot environment can limit the charge to about 80% and damage it to the point where the device can’t be fixed. Storing it in a cold environment can decrease the battery life but not irreversibly. Updating to the latest software version of iOS can allow for better energy and battery saving.
An easy way to extend battery life and save energy is by enabling low power mode. When doing this, your device will reduce the brightness, optimize device performance, and reduce system animations. Several features such as mail and iCloud will be disabled at the time of power saving. Staying in this mode still lets the user use most of the apps on the phone.
Viewing the battery usage is helpful so you can see what apps are taking the most power/battery. You can see apps that are part of the background activity, which means apps are being used in the background even while keeping other apps open. You can also check the background location where you can see what apps are using location services. This takes up battery. The home and lock screen can pop up when getting a notification from an app. Meaning, they were displayed on the device and the display came up. This takes up battery because the display is coming up even when you’re not necessarily using your phone. The last thing that can effect your batter life is there is no cell coverage/signal. This can mean that your device is looking for a signal, and while it’s doing that, it’s taking up the battery for your phone.
https://www.apple.com/batteries/maximizing-performance/