A start-to-end walk-through from Apple’s own guidance. No made-up savings. Just the screens, what they do, and the taps.

Eight iPhone battery changes you can make today, in order, with the exact Settings path for each one. Brightness, Auto-Lock, Wi-Fi, Background App Refresh, Location, Low Power Mode, and charging. Plus the two habits Apple says you can skip.

Apple does not promise a magic number of extra hours. How long your phone lasts depends on what you do with it, and which apps you use. The useful part is that iPhone already shows you where the power went, and it already has switches that slow the drain.

Do these eight things in order. Start with the Battery screen, so you are not guessing. Then change the screen, the connection, the apps in the background, and the way you charge. If a menu is missing, your model may not have that feature. Leave it, and move to the next tip.

Do not change ten switches before you look. The Battery screen tells you what is using power today, and it may already suggest a fix.

You need iOS 26 or later to see the Daily Usage chart and to use Adaptive Power. Older iPhones still have a Battery screen. Use whatever list you see there.

If you see Notifications under an app, you can make that app wake the screen less often. Go to Settings, tap Notifications, tap the app under Notification Style, and turn off Allow Notifications. Or leave alerts on, and use Scheduled Summary under Settings, then Notifications, so several apps arrive together instead of all day.

The screen is one of the first things Apple tells you to adjust. High brightness uses a lot of energy. Auto-brightness is on by default. It uses a light sensor to lower the screen in the dark and raise it in bright light.

If the Battery screen said your brightness is high, or that auto-brightness is off, this is the fix. You can still see the screen. You are only stopping it from staying brighter than the room.

When auto-brightness is on, that slider will move by itself as the light around you changes. If it seems stuck, turn Auto-Brightness off, then on again.

Dark Mode, True Tone, and Night Shift live on the Display & Brightness screen too. Apple describes those as easier on your eyes. This letter does not claim they save battery, because Apple’s battery pages do not say that. For battery, dim the screen or let auto-brightness do it.

A screen that stays on is a screen that keeps using power. Auto-Lock is how long iPhone waits before it dims and locks. Apple’s own suggestion, when Auto-Lock is off and the phone is often idle, is simple: turn Auto-Lock on. Apple also says that delaying Auto-Lock, or stopping it, can increase power use.

Attention Aware features can keep the screen from dimming while the phone thinks you are looking at it. That is separate from the timer below. Set a real Auto-Lock time anyway.

Always On Display is a different switch. On supported models it keeps a dim Lock Screen visible, so you can glance at the time, notifications, and widgets. It is on by default on iPhone 14 Pro, 14 Pro Max, 15 Pro, 15 Pro Max, 16 Pro, 16 Pro Max, 17, 17 Pro, and 17 Pro Max. It is off by default on iPhone Air. The display already goes fully dark in some cases, such as in a pocket, face down, during Low Power Mode, during Sleep Focus, or at your usual bedtime.

If you rarely need that dim Lock Screen, turn it off:

If you keep it on, you can open Always On Display and turn Show Wallpaper or Show Notifications off. If you do not see Always On Display at all, your iPhone does not have it. Skip this part.

When an app needs the internet, Wi-Fi uses less battery than a cellular network. A strong signal uses less energy than a weak one, for both Wi-Fi and cellular. Leave Wi-Fi on. Turning it off is not a battery trick.

On iPhone 12 models and later, and on iPhone SE (3rd generation), you can also use 5G Auto. If 5G is not giving you a clearly better experience, the phone switches to LTE and saves battery.

If you do not see 5G Auto, your model or carrier plan may not offer it.

After you leave an app, iPhone soon puts it in a suspended state. A suspended app is not actively open and is not taking up system resources. Background App Refresh is the extra part. It lets those suspended apps check for new content.

That is handy. It also shows up as background use. If the Battery screen said Background Activity for an app, use that app less, and stop the refresh you do not need. Low Power Mode turns Background App Refresh off for you, but you can set it yourself for every day.

Off means apps do not refresh in the background. Wi-Fi means they only refresh on Wi-Fi, which is the middle path if you still want updates at home. Wi-Fi & Cellular Data lets them refresh on either connection.

If you quit an app from the App Switcher, it may not be able to run or check for new content until you open it again. That is not a reason to quit every app. Change the refresh setting instead.

Location can run while you are in another app. Apple lists that under Background Activity, next to things like tracking location. Maps and a few other apps need it. Many apps do not need it all the time.

Do not turn Location Services off for the whole phone. Apple says many important iPhone features stop working if you do. Change it app by app.

Apps that recently used location can show an indicator next to the switch. Start with those. A location arrow in the status bar means an app is using Location Services right now.

You can also review Settings, then Privacy & Security, then Location Services, then System Services. Only turn off a system service if you know you do not want it. If a label is unclear, leave it on.

Low Power Mode is Apple’s direct way to stretch the charge you have left. It does this by limiting features, not by a secret boost. Your battery icon turns yellow while it is on. It turns itself off once the phone charges to 80 percent or higher.

While it is on, Apple says it can set Auto-Lock to 30 seconds, reduce brightness, turn off some visual effects, pause iCloud Photos for a while, turn off automatic downloads, turn off email fetch, and turn off Background App Refresh. On iPhone 12 and 13 it keeps 5G on for streaming and large downloads. On models with a ProMotion display, it limits the refresh rate to 60 frames per second. Some tasks may feel slower. You can still call, text, use email, and use the internet.

Adaptive Power is the automatic cousin, on supported iPhones with iOS 26 or later. Apple lists iPhone 15 Pro, iPhone 15 Pro Max, iPhone 16 models, iPhone Air, iPhone 17 models, and iPhone 18 Pro models. It can lower brightness, limit background activity, and make performance changes on heavy days. It can also turn Low Power Mode on by itself at 20 percent. On supported models it may already be on. If you do not see it, your iPhone does not have it.

To turn Low Power Mode on yourself:

To check Adaptive Power:

iPhone also asks about Low Power Mode when the battery reaches 20 percent, and again at 10 percent. You can say yes then, instead of leaving it on all the time.

The tips above are about today’s charge. This one is about lifespan. Every rechargeable battery ages. Heat and the way you charge it are part of that. As it ages, it holds less, so the same day of use feels shorter.

Apple’s plain advice: for most people the battery should last the day, and you can charge every night even if it is not empty. The phone stops charging when it is full, so overnight charging is safe. If the level later drops below 95 percent, charging starts again. When you can, unplug after it is full. You do not need a strict unplug-at-80 rule for this to be safe.

Optimized Battery Charging is on by default. It learns your routine and holds off past 80 percent when it thinks you will stay on the charger for a long time, then finishes so the phone is full when you unplug. It needs at least 14 days to learn, and at least nine charges of five hours or more in a given place, before it starts. A Lock Screen note tells you when it will be full. If you need it sooner, touch and hold that note and tap Charge Now.

iPhone 15 and later can also use a Charge Limit, from 80 percent to 100 percent, in steps of 5. The phone charges to within a few points of that limit, then stops. If it drops by more than 5 percent while still plugged in, it charges again up to the limit. If the limit is under 100 percent, it will sometimes charge to 100 percent so the percentage stays accurate. iOS may suggest a limit based on your habits. That suggestion is optional.

Heat matters as much as the percentage. iPhone likes a room around 16° to 22° C. Avoid using or charging it in heat above 35° C. That heat can permanently reduce how long the battery lasts. A cold day can make the battery look worse, but that comes back when the phone warms up. The phone may also dim, and it may limit charging above 80 percent, until it cools. If it gets hot inside a case while charging, take the case off for the charge.

To see health: on iPhone 15 and later, go to Settings, then Battery, then Battery Health. On iPhone 14 and earlier, go to Settings, then Battery, then Battery Health & Charging. If it says Service, follow the on-screen steps. A replacement is how you get capacity and performance back. There is no settings trick for a worn-out cell.

Two popular battery tricks are ones Apple itself tells you not to bother with.

Do not force-quit every app to save power. Apple says iPhone manages background apps, and quitting apps you are not using does not make the battery last longer. Close an app only when it is frozen or not responding. Open the App Switcher, find that one app, and swipe up on it. Then open it again from the Home Screen. Closing all of your apps does not change overall performance either.

Look at Settings, then Battery, before you change anything. Dim the screen, let it lock, use Wi-Fi, and cut the background refresh and location access you do not need. Use Low Power Mode on a long day. Leave Optimized Battery Charging on, and keep the phone out of high heat.

If this was useful, forward it to someone who is sure their iPhone dies too fast.