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Phone battery dying too fast? 12 Tips to extend its life

Mar 04, 2025

Author: ASUS    Reading time: 6 minutes

a green Zenfone 12 Ultra leaning against an ASUS Zenbook laptop, placed on a brightly-colored wooden desk, with everyday objects lying around it

Mar 04, 2025

Is your Zenfone 12 Ultra running out of juice faster than you'd like? Despite its robust 5500mAh battery designed for all-day use, various factors can cause your phone to drain quicker than expected. Let's dive into some practical tips to help you extend your battery life — starting from knowing the current condition and making sure everything is up to date, to optimizing the battery settings, to developing battery-saving habits, and finally, ensuring the longevity of the battery health.

Check Your Battery Health

First things first, it's essential to know the current state of your battery. Over time, batteries tend to degrade, leading to reduced performance. To check your Zenfone 12 Ultra's battery health, go to Settings, tap on Battery, and select Battery usage to see how your phone charge changes over time and which apps consume the most power. Monitoring this regularly can help you identify and manage power-hungry apps. More on managing the apps later.

Battery settings screen in ASUS Zenfone 12 Ultra

a Battery usage screen in Battery settings of Zenfone 12 Ultra

Keep Your Software Up to Date

The second step is to make sure your phone’s system is up to date. Manufacturers release software updates regularly to optimize performance. That also includes optimization for maximized battery life. To check if your phone is up to date, go to Settings > System > System update. Check if there are any new updates and install if available. Regular updates can fix bugs and improve battery efficiency, and provide you with the latest, most up to date functions — e.g. ever-improving battery saving mode settings.

Optimize Power-Saving Modes

Low battery power-saving settings screen in ASUS Zenfone 12 Ultra

The Zenfone 12 Ultra offers power-saving modes that can help you automatically optimize the battery setting to extend battery life. You can do so manually — for example, when you know you have a long day away from the power plug ahead of you. To change the power-saving modes manually, go to Settings, tap on Battery, select Low battery power-saving, and toggle the Enable power-saving mode automatically on. This feature automatically activates the battery saver when your charge drops below a certain threshold.

Monitor App Battery Usage

A list of apps and their corresponding battery usage inside the Battery usage screens in the Battery Settings menu of ASUS Zenfone 12 Ultra

Some apps run in the background, consuming power without your knowledge. To identify these, go to Settings > Battery > Battery usage. Take some time to review the list of apps and their battery consumption. If you spot apps you rarely use but consume significant power, consider uninstalling or restricting their background activity. More on that in the next part.

Some apps, such as games, can also be quite power-hungry, and the Battery Usage function can help you identify the ones that consume the most energy, so when you’re in need of a longer battery life in your day, try to avoid those.

Manage Background Processes

Chrome App battery usage settings view, with the “Allow background usage” setting toggled on in ASUS Zenfone 12 Ultra

Background processes can silently drain your battery, and not all of them are crucial at all times. To manage your background processes, navigate to Settings > Apps & notifications > All apps. Select an app you’d like to manage, then tap App battery usage. Toggle off Allow background usage to limit its activity when not in use. Repeat for any app you think may not always need to be running in the background. You could also adjust the background processing settings inside some of the apps’ settings. For example, for an email client app, you can change how frequently the app checks for new emails and downloads new messages.

Adjust Screen Brightness

Quick Settings menu view of ASUS Zenfone 12 Ultra

Aside from optimizing your battery settings, you can also adjust simple settings of your phone quickly and change them according to your needs. Start with adjusting the screen brightness. Your phone's display is one of the primary battery consumers. Keeping it at maximum brightness can significantly drain power. And let’s be honest, in certain situations, such as when using your phone after dark, you don’t need the full brightness. To optimize, swipe down from the top to access the Quick Settings menu. Then, find the brightness slider and adjust it to a comfortable level.

Display settings view in ASUS Zenfone 12 Ultra, with Adaptive brightness function toggled on

You can also enable the Adaptive brightness in Settings > Display to let your phone adjust brightness based on ambient light.

Utilize Dark Mode

System color scheme settings view in ASUS Zenfone 12 Ultra, with the Dark mode selected

To push the screen-related battery savings one step further, you can consider the dark mode. The dark mode of the phone UI can be an aesthetic choice for some; for others, it can help with eye fatigue. But it also carries an additional benefit — improved battery life. To enable the dark mode, navigate to Settings > Display > System color scheme, and select the Dark Theme. Dark mode reduces power consumption by displaying darker pixels — especially beneficial for AMOLED screens — such as one in the Zenfone 12 Ultra — where each pixel is illuminated individually, so if it’s displaying black, it simply stays off, not consuming any power.

Disable Unnecessary Features

A quick settings menu view in ASUS Zenfone 12 Ultra

Features like Bluetooth, GPS, and NFC are handy but can drain your battery when not in use. Ensure you turn them off when they're not needed. To do so, access the Quick Settings menu by swiping down from the top. Then, toggle off Bluetooth, GPS, or NFC as required. To turn them back on, repeat the process, but toggle on.

Limit Widgets and Live Wallpapers

While widgets and live wallpapers can be pleasing to the eye and enhance the usability and ease of access to certain features, they can consume additional power. It may be a good idea to limit the number of active widgets, especially those that update frequently. You can also opt for static wallpapers rather than animated ones to reduce battery drain.

Keep Your Device Cool

There are also some “physical” fixes you can adopt to help you increase the battery life. Heat is a known enemy of battery health. To help improve the battery life and longevity, keep your phone out of direct sunlight — especially during hot days. It may also be a good idea to remove the protective case while charging. Some cases can trap heat. Removing them during charging can help dissipate heat. The official ASUS cases are designed to physically protect your phone from mechanical damage while keeping things airy and safe from overheating.

Adopt Healthy Charging Habits

Finally, there are some healthy habits you can adopt to ensure your battery not only lasts longer per day, but also continues performing for years. Your charging routine can impact battery longevity. It is a good practice to avoid charging to 100% regularly. Keeping your battery between 20% and 80% is the healthiest and it can prolong the battery lifespan.

charging mode settings view in the Battery Settings menu of an ASUS Zenfone 12 Ultra

You can use automated healthy charging settings or control this yourself. The charging mode can be adjusted after connecting the phone to charging. To adjust these settings, go to Settings > Battery > Charging mode, and select between three modes that best suit your needs: the Regular charging mode, where the charger powers the system while at the same time charging the battery; the Bypass charging mode, which causes the charger to only power the system and not charge the battery; and Smart bypass mode, which automatically stops supplying the power necessary to charge the battery when it is sufficiently charged (to avoid potentially harmful overcharging) and only provides power to the system.

Also remember only to use official, licensed chargers — best if you just use the charger that came with your device or official replacements to ensure stable and safe charging. Additionally, it may be a good idea to avoid using your phone while charging. This practice can generate heat, which can be detrimental to battery health.

Restart Your Phone Regularly

And the last good habit to adopt on our list: restarting your phone regularly. A simple restart can resolve minor glitches that might be draining your battery. To restart your Zenfone, hold down the power button and select Restart. Doing this once a week can help maintain optimal performance.

By implementing these strategies, you can significantly extend your Zenfone 12 Ultra's battery life, making it even more pleasant and convenient, making your everyday exceptional.

*These instructions apply to smartphones running the latest version of the Android OS. Usage and functions may vary depending on the operating system and phone model.

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