We’ve all been there: you’re halfway through the day, miles from a charger, and your iPhone hits that dreaded 20% warning. It is one of the most frustrating experiences of modern tech life. You rely on your phone for maps, communication, and work, and when the battery fails, everything else feels slightly more chaotic.

The good news is that sudden battery drain is rarely a “broken” phone. More often than not, it is a software conflict, a background process running amok, or simply a setting that hasn’t been optimized. After helping countless friends and family troubleshoot their devices, I’ve found that a few simple adjustments can often recover hours of usage time.

The dreaded 20% low battery alert.. Source: MUO

Step 1: The “Low-Hanging Fruit” Fixes

Before diving into complex settings, start with the basics. Many users unknowingly leave high-drain features running when they aren’t needed. These changes take seconds and can have an immediate impact on your daily battery percentage.

• Toggle Auto-Brightness: Your screen is the biggest power consumer. Go to Settings > Accessibility > Display & Text Size and ensure Auto-Brightness is on. If you prefer manual control, keep your brightness below 50% indoors.

• Enable Dark Mode: If you have an iPhone with an OLED screen (iPhone 12 and newer), switching to Dark Mode (Settings > Display & Brightness) actually saves power because the black pixels are physically turned off.

• Disable “Raise to Wake”: This feature is convenient but causes your screen to light up every time you move your phone, even if you’re just walking. Turning this off (Settings > Display & Brightness) prevents unnecessary screen time.

Adjusting display settings is the fastest way to save power.. Source: Device Guides – Optus

Step 2: Identify the Real Culprit

Not all apps are created equal. Some apps “phone home” to servers constantly, while others might be stuck in a crash-loop in the background. Apple provides a built-in diagnostic tool that tells you exactly which apps are eating your power.

Go to Settings > Battery. Scroll down to the “Battery Usage by App” list. Look for apps that show high percentages compared to your actual usage time.

Pro Tip: If an app you rarely use is at the top of the list, delete it or restrict its background permissions. If a social media app is consuming 40% of your battery despite you only using it for 10 minutes, that app is likely malfunctioning in the background.

Check the battery usage menu to spot power-hungry apps.. Source: Apple Support

Step 3: Manage Background App Refresh

Background App Refresh is intended to keep your apps up to date, but in practice, it allows dozens of apps to wake up your processor throughout the day. For most people, this is unnecessary.

To limit this, go to Settings > General > Background App Refresh. You can either turn it off globally or, better yet, toggle it off for specific non-essential apps like games, shopping apps, or news aggregators. Keep it enabled only for apps where real-time data is critical, such as Maps or email clients. This simple change can extend battery life by 8–12% daily.

Step 4: Optimize Location Services

GPS is a massive battery drain because it forces your phone to constantly communicate with satellites and cell towers. Many apps request “Always On” location access when “While Using” is perfectly sufficient.

Review your permissions by going to Settings > Privacy & Security > Location Services. Go through the list and change any app set to “Always” to “While Using” or “Never.” If you don’t need a specific app to track you, disable it entirely.

Step 5: What to Do After an iOS Update

Have you noticed your battery draining faster immediately after a major iOS update? Don’t panic. This is normal. After an update, your iPhone performs heavy background tasks like Spotlight indexing (re-cataloging every file on your phone) and iCloud photo synchronization.

These processes are resource-intensive and can last 48–72 hours. To speed up the process, keep your phone plugged in overnight while on Wi-Fi. Once the indexing is complete, your battery life should return to normal.

Low Power Mode is your best friend on long days.. Source: Reader’s Digest

Step 6: Check Your Battery Health

If you’ve tried all the software fixes and your phone still dies by noon, the issue might be hardware-related. Lithium-ion batteries are consumable components; they lose capacity over time.

Check your current status by going to Settings > Battery > Battery Health & Charging. Look at the Maximum Capacity percentage.

• Above 90%: Your battery is in great shape. The drain is almost certainly software-related.

• 80–90%: The battery is aging but still functional. You may notice faster drain during heavy tasks.

• Below 80%: Your battery is degraded. At this stage, your iPhone may dynamically throttle performance to prevent unexpected shutdowns. It is likely time to consider a battery replacement from Apple or an authorized service provider.

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Check your maximum capacity to see if the battery needs replacing.. Source: MUO

Long-Term Habits for Battery Longevity

Preventing future drain is just as important as fixing current issues. Implementing these habits will keep your battery healthy for years:

• Avoid Extreme Temperatures: Heat is the #1 enemy of lithium-ion batteries. Never leave your iPhone in a hot car or in direct sunlight for extended periods.

• Use Optimized Battery Charging: Keep this feature enabled (Settings > Battery > Battery Health & Charging). It learns your daily routine and waits to finish charging past 80% until you need to use the phone, reducing wear on the battery cells.

• Avoid “0 to 100” Cycles: Try to keep your battery between 20% and 80%. Regularly draining your phone to 0% puts significant stress on the chemical components inside.

• Use Quality Chargers: Always use MFi-certified (Made for iPhone) cables and power bricks to prevent voltage spikes that can damage the internal power management chip.

Frequently Asked Questions (FAQ)

Does “Force Closing” apps actually save battery?

Contrary to popular belief, no. iOS is designed to manage apps efficiently. Forcing an app to close from the App Switcher clears it from RAM, but when you reopen it, the phone has to use more energy to reload the app from scratch. Only force-close apps that are frozen or unresponsive.

Is Low Power Mode bad for my iPhone?

Not at all. Low Power Mode is a safe, effective tool. It temporarily reduces background activity, lowers screen refresh rates, and limits CPU speed. It is perfectly fine to use whenever you know you have a long day ahead and limited access to a charger.

Why does my phone get hot while charging?

Fast charging generates heat as a byproduct of moving energy quickly into the battery. While a warm phone is normal, it should never be “hot” to the touch. If it feels extremely hot, remove the case and unplug it until it cools down.

Should I turn off 5G to save battery?

If you live in an area with spotty 5G coverage, your phone may be constantly “searching” for a signal, which drains the battery rapidly. If you notice poor signal strength, go to Settings > Cellular > Cellular Data Options > Voice & Data and switch to LTE. You likely won’t notice a speed difference for day-to-day browsing, but your battery will thank you.