I just discovered what’s really draining your iPhone battery — and it’s not what you think

iPhone 16 Pro shown held in hand
(Image credit: Tom's Guide)

Your iPhone’s battery doesn’t drain at random, though it can certainly feel that way when you’re down to 20% by noon. Most people blame obvious culprits like brightness or 5G, but the real issue often hides in the features you're using.

This isn't something Apple makes especially clear. When I dug into my own iPhone’s battery usage, I found three unexpected process quietly sipping power all day long. Once I turned it off, my screen-on time nearly doubled.

Here’s what’s might be behind your battery woes, and how to fix it for good.

1. Turn off Background App Refresh

(Image: © Tom's Guide )

This one setting makes a surprisingly big difference. Background App Refresh lets apps update when you’re not using them, quietly draining your battery in the process.

The thing is, iPhones are powerful enough to refresh content almost instantly when you open an app, so you won’t even notice it’s off.

Open Settings, tap General, then select Background App Refresh. Choose Off to stop all apps from updating in the background, or you can toggle off for specific ones you don’t need.

2. Adjust your Accessibility settings

(Image: © Tom's Guide )

Two often-overlooked accessibility features can quietly chip away at battery life. Auto-Brightness sounds smart, but it constantly recalibrates based on lighting conditions, which can keep your display busier than necessary.

Go to Settings, Accessibility, Display & Text Size, scroll to the bottom, and toggle Auto-Brightness off. You’ll have full manual control via the Control Center, which is easier and more efficient.

Next, return to the Accessibility menu, select Motion, and turn on Reduce Motion. This trims down interface animations and transitions, giving your phone less graphical work to do. It’s a small tweak that makes iOS feel snappier and lighter on power.

3. Turn off Raise to Wake

(Image: © Tom's Guide )

Every time you pick up your iPhone, it wakes the screen — even if you didn’t mean to check it. That constant flicker burns through more power than you’d think.

Go to Settings, tap Display & Brightness, then scroll down and toggle Raise to Wake off. From now on, your screen will stay dark until you deliberately tap it or press the side button. You’ll instantly notice fewer accidental wake-ups and a longer-lasting charge.

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Kaycee Hill
How-to Editor

Kaycee is Tom's Guide's How-To Editor, known for tutorials that skip the fluff and get straight to what works. She writes across AI, homes, phones, and everything in between — because life doesn't stick to categories and neither should good advice. With years of experience in tech and content creation, she's built her reputation on turning complicated subjects into straightforward solutions. Kaycee is also an award-winning poet and co-editor at Fox and Star Books. Her debut collection is published by Bloodaxe, with a second book in the works.

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