How to Extend iPhone Battery Life: Settings, Battery Health, and When to Replace

A dead phone in the middle of a workday is a real problem. You miss calls, can’t check email, and can’t scan a code or take a payment. The good news is that a few settings and habits can stretch your battery a lot, and a quick check can tell you whether the battery itself is the issue.

Menu names change a little between iOS versions and iPhone models. If you don’t see a setting exactly as described here, use the search bar at the top of the Settings app or check Apple’s current support pages.

Quick fixes when your battery is low right now

If you are running low and nowhere near a charger, start here.

Turn on Low Power Mode

Low Power Mode is the fastest fix. Go to Settings, then Battery, then Low Power Mode. You can also add it to Control Center so it is one tap away.

When it is on, your iPhone cuts back on background activity. Depending on your model and iOS version, that can mean fewer automatic downloads, slower mail checking, a dimmer screen, and a faster auto-lock. The battery icon turns yellow while it is on. Many iPhones turn it off automatically once the battery is charged well past the warning level.

Lower the screen brightness

The screen is one of the biggest power users on your phone. Swipe down from the top right corner (or up from the bottom on older models) to open Control Center, then drag the brightness slider down. Turning on Auto-Brightness in the display or accessibility settings lets the phone adjust for you.

Shorten Auto-Lock

Go to Settings, then Display & Brightness, then Auto-Lock. A shorter time means the screen goes dark sooner when you set the phone down. Thirty seconds or one minute is plenty for most people.

Use Airplane Mode in weak coverage

If you have little or no signal, your phone keeps searching for a tower, which uses extra power. If you are in an elevator-heavy building, a basement, or a rural area and don’t need the phone for a while, Airplane Mode can help. Just remember to turn it off when you need calls and texts again.

Settings that save battery all day

These take a few minutes to set up and keep paying off.

1. Check Background App Refresh. Go to Settings, then General, then Background App Refresh. Turn it off for apps that don’t need to update when you aren’t using them.
2. Review Location Services. Go to Settings, then Privacy & Security, then Location Services. Set apps that don’t need your location to “Never” or “While Using the App” instead of “Always.”
3. Trim notifications. Every alert can wake the screen. In Settings, then Notifications, turn off the ones you don’t act on.
4. Change how mail arrives. In Settings, then Mail, then Accounts, then Fetch New Data, you can choose push, fetch on a schedule, or manual. Checking less often uses less power, but you will see new mail later.
5. Try Dark Mode. On iPhones with OLED screens, dark backgrounds can use less power. Find it under Settings, then Display & Brightness.
6. Turn off extras you don’t use. Some models have features like Always-On Display or Raise to Wake. If you don’t want them, switch them off in the display settings.
7. Keep iOS and your apps updated. Updates often include fixes for apps that use too much power.

What about Wi-Fi?

An older tip says to turn off Wi-Fi to save battery. In general, that is not good advice. Wi-Fi usually uses less power than cellular data, especially when your signal is weak. Leave Wi-Fi on when you are in the office or at home. Bluetooth is a small drain, so turn it off only if you are not using headphones, a watch, or a car connection.

Find out what is draining your battery

Your iPhone tells you which apps use the most power. Go to Settings, then Battery and look at the usage list. You can view the last 24 hours or the last several days.

Look for apps that use a lot of power compared with how much you actually use them. If a social media, navigation, or video app is at the top, adjust its background and location settings, or delete it if you don’t need it.

If your phone gets warm while sitting in your pocket, a stuck or misbehaving app may be the cause. Close it, restart the phone, and check for an app update.

How to check your iPhone battery health

Even with perfect settings, batteries wear out over time. Here is how to see where yours stands.

1. Open Settings.
2. Tap Battery.
3. Tap Battery Health or Battery Health & Charging, depending on your iOS version.
4. Look at Maximum Capacity. This compares your battery’s current capacity to when it was new.
5. Read any message below it. Your iPhone may say the battery is normal, or it may suggest service.

A lower Maximum Capacity means the phone holds less charge than before, so you will need to charge more often. Apple publishes how long it expects batteries to hold up for each model, so check its current support pages for your phone.

You may also see a note about peak performance. On some phones, a worn battery can cause the phone to slow down or shut off unexpectedly to protect itself. If you see that message, the battery is a likely cause of your problems.

Charging habits that help the battery last

How you charge affects how fast the battery wears.

• Turn on Optimized Battery Charging. It is in the Battery Health settings. Your iPhone learns your routine and slows charging past a certain point when it expects to stay plugged in for a while, such as overnight.
• Look for a charge limit option. Some newer iPhones let you set a charging limit. If your model has it, it can help if the phone sits on a charger at a desk all day. Check your settings to see if it is available.
• Keep it cool. Heat is hard on batteries. Don’t leave your phone on a car dashboard, in direct sun, or under a pillow while charging. If a thick case makes the phone hot while charging, take it off.
• Use good chargers. Choose a quality charger and cable, ideally ones made by Apple or certified for iPhone.
• Top up when it is convenient. You don’t need to run the battery to zero. Short charges during the day are fine.

When is a battery replacement worth it?

Replacing the battery is often worth it when the rest of the phone still works well. Think about a replacement if:

• Maximum Capacity is low and your phone no longer lasts through a normal workday.
• The phone shuts down suddenly, even when it shows some charge left.
• The phone seems slower than it should be, and the Battery Health screen points to the battery.
• You see a message recommending service.

Stop using the phone and get it checked right away if the case looks bulged, the screen is lifting, or the phone gets unusually hot. Those can be signs of a damaged battery.

A new battery may not be the right move if the phone is very old, no longer receives iOS updates, or has other problems like a cracked screen or poor performance. In that case, upgrading may make more sense. Either way, back up your phone first.

For repairs, go through Apple or an Apple Authorized Service Provider, or choose a repair shop you trust. Ask what parts they use and what warranty they offer on the work.

Tips for work phones and busy teams

If your team relies on iPhones for email, calls, scanning, and customer messages, a few habits help.

• Keep a charger at each desk and in company vehicles.
• Give field staff a portable power bank. They are small enough for a bag or pocket.
• Set a reminder to check Battery Health on older phones once or twice a year.
• Plan for replacements before a phone fails at a bad time.

If your company manages many phones, laptops, and accounts, device settings and updates can become hard to track. Managing them in a consistent way is part of what managed IT services can cover, and we arrange those through our IT partners.

A simple battery routine

You don’t need to change everything. Start with these three steps:

1. Use Low Power Mode when the day gets long.
2. Cut back on background refresh, location access, and notifications.
3. Check Battery Health every few months and turn on Optimized Battery Charging.

If the battery still doesn’t last after that, the battery itself is likely worn, and a replacement is the next step. For more practical tips like these, see our more how-to guides.

Frequently asked questions