iPhone Battery Draining Fast? How to Improve Battery Life

If your iPhone battery is draining too quickly, the fix usually involves adjusting a few settings and checking which apps are using the most power. This guide walks you through the most effective steps to improve battery life, from identifying the culprits to changing settings that reduce background activity.

Why Your iPhone Battery Drains Fast

All iPhone batteries degrade over time, but a sudden drop in battery life is often caused by software, settings, or specific apps rather than hardware failure. Common reasons include:

Background App Refresh – Apps updating content in the background even when you aren’t using them.
Screen Brightness – A bright display is one of the biggest battery drains.
Location Services – Apps constantly tracking your location can consume significant power.
Push Email and Fetch – Frequent email checks keep the network active.
Weak Cellular Signal – Your phone works harder to maintain a connection in low-signal areas.
Outdated iOS – Software bugs can cause abnormal battery drain.
Battery Age – Lithium-ion batteries lose capacity after about 500 full charge cycles.

Check Battery Usage in Settings

Before changing anything, see which apps are actually using the most battery. Go to Settings > Battery. The list shows usage over the last 24 hours or last 10 days. Tap the clock icon to see on-screen vs. background activity.

Look for apps with high Background Activity – those are using power even when you aren’t using them. If you see an app you rarely use with high background usage, that’s a clear target.

Adjust Screen and Display Settings

The display is usually the biggest battery consumer. To reduce its impact:

Turn on Auto-Brightness (Settings > Accessibility > Display & Text Size > Auto-Brightness).
Lower your brightness manually or enable True Tone (if available) to adapt to ambient light.
Set Auto-Lock to 30 seconds or 1 minute (Settings > Display & Brightness > Auto-Lock).
Use Dark Mode if you have an OLED display (iPhone X and newer) – it can save battery because black pixels are turned off.

Manage Background App Refresh and Location

Background App Refresh allows apps to check for updates in the background. To disable it for all apps or just the ones that don’t need it:

Go to Settings > General > Background App Refresh.
Choose Off to disable entirely, or toggle off specific apps.
For Location Services, go to Settings > Privacy & Security > Location Services.
Review each app and choose While Using instead of Always for apps that don’t need constant access.

Turn Off Unnecessary Connectivity

Bluetooth, Wi-Fi, and cellular radios consume power even when idle. Turn off features you aren’t using:

Bluetooth – If you aren’t using AirPods or an Apple Watch, turn it off in Control Center.
Wi-Fi – If you’re on a strong cellular connection and don’t need Wi-Fi, turn it off.
Cellular Data – In areas with poor signal, consider switching to Airplane Mode or Wi-Fi calling.
Personal Hotspot – Turn it off when not sharing your connection.

Update iOS and Check Battery Health

Apple regularly releases iOS updates that fix battery drain bugs. Go to Settings > General > Software Update and install any available update.

Also check your battery’s maximum capacity: Settings > Battery > Battery Health & Charging. If it’s below 80%, your battery may need service. Apple considers a battery to be degraded when it holds less than 80% of its original capacity.

Additional Tips and Common Misconceptions

Here are a few more things that help, and one myth to ignore:

Low Power Mode – Turn it on from Control Center or Settings > Battery. It reduces background activity and performance slightly, but can extend battery life by several hours.
Disable Raise to Wake – If you don’t need the screen to turn on every time you pick up the phone, turn it off in Settings > Display & Brightness.
Don’t force-quit apps – Swiping apps away from the app switcher doesn’t save battery; it actually uses more power when the app reloads from scratch.
Myth: Charging overnight ruins your battery – Modern iPhones stop charging at 100% and use optimized battery charging to reduce wear. It’s safe to leave it plugged in overnight.

When to Consider a Battery Replacement

If you’ve tried all the above and your battery still drains quickly, it may be time for a new battery. Apple’s battery service costs a fee (check Apple’s website for current pricing), but it’s often cheaper than a new phone. You can also take your iPhone to an Apple Store or authorized service provider for a diagnostic.

If your iPhone is still under AppleCare+ or a limited warranty, the replacement may be free if the battery is defective.

Frequently Asked Questions

Why is my iPhone battery draining so fast all of a sudden?

A sudden drain is often caused by a recent software update, a specific app that’s misbehaving, or a change in your usage pattern. Check the Battery screen to see which app is using the most power. If it’s an app you don’t use, delete it. If the problem started after an iOS update, try restarting your phone or checking for another update.

Does closing background apps save battery?

No. Force-quitting apps can actually increase battery drain because the app has to relaunch from scratch the next time you open it. iOS is designed to freeze background apps so they use minimal power. Leave them alone unless an app is frozen or unresponsive.

Should I use Low Power Mode all the time?

You can, but it disables some features like background app refresh, automatic downloads, and 5G. It also reduces performance slightly. It’s best to use it when your battery is below 20% or when you know you won’t be able to charge for a while.

How do I know if my battery needs replacing?

Go to Settings > Battery > Battery Health & Charging. If Maximum Capacity is below 80%, your battery is significantly degraded. Also, if your iPhone shuts down unexpectedly or gets hot even with light usage, that’s a sign the battery is failing.

Does Dark Mode really save battery?

Yes, but only on iPhones with OLED displays (iPhone X and later). OLED pixels are individually lit, so black pixels are turned off. If you use dark mode consistently, you can save a noticeable amount of battery, especially if you use apps with dark backgrounds.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →