How to Check Battery Health on iPhone with iOS 11.3

Apple introduced a new feature - Battery to iPhone, iPad with iOS 11.3. If you have updated your iPhone X, 8/8 Plus, 7/7 Plus, 6/6 Plus/6s/6s Plus, 5s to iOS 11.3 and above, you can use the new feature to check battery health on your iPhone. If you have iOS 11.3, you can check iPhone battery performance with other methods.

It is important to ensure that the iPhone battery is in good condition. Otherwise, the iPhone may get slows and need to be charging frequently.

iOS 11.3 Battery Health: How to Check iPhone Battery

It is easy to check iPhone X/8/7/7 Plus/6/6s/5s battery health if your phone is running on iOS 11.3 and above.

• Open Settings on your iPhone.
• Tap Battery > Battery Health.
• You will see two data points: Maximum Capacity and Peak Performance Capability.

Maximum Capacity - It refers to the percentage of battery capacity relative to when the battery is new. Lithium-ion batteries on iPhone chemically age, with the amount of charge they can hold diminishes. When your iPhone is first bought, the Maximum capacity should show 100%; as you continue to use the iPhone, the number decreases. If your iPhone's maximum capacity is below 80%, a message will show suggesting you change the battery.

Peak Performance Capability - When your battery is working normally, you will see "Your battery is currently supporting normal peak performance" in this area. But when your iPhone shuts down unexpectedly because of an older battery, low temperatures, or a low battery state of charge, it will say:

"This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again. Disable…"

You can tap the "Disable" link to turn off the performance management.

iOS 11.2 or Earlier: How to Check iPhone Battery Health on Your Own

If you don't want to update your iPhone to iOS 11.3, you can also use Console on Mac to help you check iPhone battery health.

• Launch Console on Mac.
• Connect your iPhone to the iMac or Macbook.
• Type batteryhealth in the search column. It will show the condition of your iPhone battery.
• If your iPhone battery is in good health, it will show "BatteryHealth = Good". You can look into other data such as battery capacity, power source.

Also, there are third-party apps that can help you check iPhone battery, such as Geekbench, Battery Life, coconutBattery. You can search battery apps for iPhone on App Store.

Tips: Maximize Battery Life on iPhone

It is inevitable that iPhone battery degrades as time goes by. However, there are some things you can do maximize battery life on your iPhone X/8/7/6/5.

1. Reduce screen brightness. First, dim your iPhone screen. Or you can turn on Auto-Brightness on Settings > Display & Brightness to let iPhone adjusts screen accordingly.

2. Use Wi-Fi instead of cellular data. iPhone battery drains faster when under cellular network.

3. Enable Low Power Mode. So your battery level goes down to 20%, Low Power Mode can reduce display brightness, optimize device performance, and minimize system animations.

4.Turn off Background App Refresh. Background App Refresh allows apps to refresh when it is not in use. So you may go to Settings > General > Background App Refresh to turn it off.

5. Turn off Location Services. Go to Settings > Privacy > Location Services and toggle off the buttons for the apps that you want to stop from using Location Services.