Many people have been asking me how do I maintain good battery health on my iPhone. This is worth reading especially if you're a heavy user of any iOS device. Before I give the tips, lemme share something first. I am a huge fan of Apple or any iOS device. I started using the iPhone way back 2007, which is the first flagship device of Apple, the iPhone 2G. Now, I am an iPhone 7 user, using it for almost 2 years but still have 97% of battery health. (Sorry don't have enough budget to buy iPhone XS max as of the moment) But I still have my lower generation iPhones. Our phones go with us everywhere, even in water. (Nowadays, smartphones have Ingress Protections) So that means we are also consuming our battery's life harder. I've been seeing posts and questions with regards to Battery Health of iOS device which they said, was degrading fastly for unknown reasons. Lemme correct that there is a reason why this thing happens. So here are some tips on how we can prevent that. *Do not let your phone reach 20%, or lower, or even the first warning for low power mode as it may lead to damaging your battery, causing your battery health to be degraded thoroughly. If you have your charger and a power source with you, charge your phone even if it's still 30% or higher. Charging your phone consecutively ain't bad. In fact, it is a good practice for your battery. *Using your phone while charging ain't bad too. Just make sure, to use a "certified/authentic" charger from Apple. If you have some extra budget, I would highly recommend you to buy the 12 watts version of wall charger rather than the 5 watts. I know it is very costly but trust me, it's very worth it. It will charge your phone even faster. *Just because it is indicated above that your phone is already 100% doesn't mean it is fully charged. The indicator above is just a measure and is not totally accurate. So I would advise you to still charge it for 10-15 minutes for a fully charged battery. *Overcharging is not an issue with the batteries of the iPhone because its battery has its own memory, which automatically stops receiving power when fully charged. *To maximize your phone's battery life: -Turn off the Background App Refresh To turn it off, Go to Settings, General, Background App Refresh and turn the toggle off. -Turn off Hey Siri if it's not necessary. -Turning off the Wifi and the Bluetooth in the Control Center doesn't mean it is already off. It just disconnects your phone to any connection but still has battery consumption. Always turn it off in the settings. -Always force close apps after using them. -Do not use Low Power Mode as it will weaken your phone's power resulting in poor performance and slower processes. This will consume more energy. -Set your phone's auto-lock to 1 minute, or 30 seconds to save battery life. -Buy your own power bank so you'll never have to worry for getting into low power. -Restart your phone at least once or twice a day. This will clean your RAM and improve your phone's performance. -Turn off raise to wake up. -Auto brightness is advisable rather than adjusting it manually. Edit / Additional If in any case that you observed that your battery drains too fast even though you still have good battery health, you can perform a "Battery Calibration" in your iOS device at least once a month. Below are the instructions on how to do it. -Drain your battery life to 0% or till your phone automatically shuts off. -After draining, plug it in a charger. iOS devices will automatically boot up once it has enough charge. When it boots up, turn it off again. Do not enter your passcode or unlock the screen, just turn it off again. -Leave your phone plugged and turned off while charging for four hours, yes, four hours! -After charging it for four hours, turn it on. Do not unplug the charger yet, just go to your home screen. -Once you're on the home screen, perform a hard restart in your iOS devices. (Kindly look in Google on how to do a hard restart on your device, make sure to search the exact model because it has different procedures) -Your phone will automatically restart when you perform a hard restart. -When the hard restart is done, perform a restart again, turn off your iOS device for 10 seconds, after that, turn it back on. -Once it turns on, you may now unplugged the charger and continue using your device. Congrats! You're done calibrating it. If ever I will know some new tricks and tips for iOS devices, I will post it in the comment section. - CTTO, I saw this post shared by many of my Apple friends.