A day of maps, photos and messages can empty a full battery by mid-afternoon, usually right when you need the phone most. If you want to know how to make phone battery last longer, start with three things, which are the battery saver, the screen and the radios. Those three decide most of the day. The rest of this guide covers the smaller settings and the habits that keep the battery healthy for years, on iPhone and Android alike.
Key Takeaways
- Turn on Low Power Mode or Battery Saver in the morning, not when the warning appears.
- The screen is a top power draw, so lower the brightness and keep auto-brightness on.
- Download maps and music on Wi-Fi so the phone is not streaming all day.
- Check the battery usage list and limit any app that drains power in the background.
- Heat damages batteries, so keep the phone out of hot cars and direct sun.
How to make phone battery last longer with the battery saver
Where to find it On iPhone, Settings > Battery > Low Power Mode. On Android, Settings > Battery > Battery Saver
If you only learn one thing about how to save battery on your phone, make it this one. The saver cuts background activity, and it saves the most when it runs all day. Switch it on in the morning of a long day out, not at ten percent. My view is simple. If you already know the day will be long, the warning screen is too late.
On an iPhone, Low Power Mode turns itself off once the phone charges past 80 percent. On Android, Battery Saver turns on Dark theme and limits background activity, so some apps may update a little later. That trade is worth it when the charger is miles away.
Turn the screen down and let it sleep sooner
Where to find it Control Center on iPhone or Quick Settings on Android, then the brightness slider
The screen is one of the largest power draws on any phone. Lower the brightness and leave automatic brightness on, so the phone dims itself indoors and brightens only in the sun. Then shorten the time before the screen turns off. Thirty seconds is plenty for most people.
Dark mode helps too, especially on phones with OLED screens, which light each pixel on its own. Google lists dark theme among its battery saving settings for Android.
Download maps and music before you leave
Where to find it Your maps and music apps, then the download or offline option
Streaming and live navigation keep the radio busy, and a weak signal makes it work harder still. Save the map of the area you will walk around and download a playlist or two while you are on Wi-Fi. Then the phone can rest between uses.
This is also why Wi-Fi beats cellular when it is available. Apple notes that a Wi-Fi connection uses less power than cellular data, so join the café network when you sit down.
Find the app that drains the most
Where to find it On iPhone, Settings > Battery. On Android, Settings > Battery > Battery usage
Both systems list the apps that used the most power over the last day. If one you barely opened is near the top, it is working in the background. Close it, or limit its background activity in that app's own settings.
On an iPhone, Background App Refresh is the usual culprit, and you can turn it off app by app. On Android, Adaptive Battery learns which apps you use and holds back the rest. These phone battery saving tips sound small, but a single misbehaving app can cost hours.
Protect the battery itself
Settings decide today, and habits decide next year. Heat is the enemy. Apple says iPhone works best between 62 and 72 degrees Fahrenheit and warns against use above 95 degrees, and Google warns that a hot battery drains faster even when you are not using the phone.
A few habits keep the battery healthy for longer.
- Keep the phone out of a hot car and off a sunny dashboard.
- Use the charger that came with the phone or a certified one.
- Take off a thick case if the phone gets hot while charging.
- Install software updates, which often include power fixes.
If your battery still dies early after all this, it may simply be worn out. Our guide to hidden Android features and the iPhone settings for international travel both cover a few more switches worth knowing before a big trip.
Pack It Like a Pro
The settings above buy you hours, but a small power bank buys you the whole day. I would rather carry one and not need it. With the saver on, the screen down and the maps saved, the battery stops being a secret source of stress and becomes one less thing to think about.
FAQs about phone battery life
- Is it bad to charge my phone overnight?
- No. Modern iPhones and Android phones manage charging on their own, and many slow down near full to protect the battery. Keeping the phone cool while it charges matters more than when you charge it.
- Does closing apps save battery?
- Not usually. Both systems pause apps you are not using, and reopening a closed app can cost more power than leaving it. Close an app only when the battery usage list shows it draining power.
- How do I save battery on an Android phone fast?
- Turn on Battery Saver, lower the brightness and switch off location for apps that do not need it. Some Android phones also offer an Extreme Battery Saver that limits the phone to the essential apps.
- Does Low Power Mode hurt my iPhone?
- No. Low Power Mode only reduces background activity and some visual effects until you charge again. It is safe to leave on all day, and it turns off by itself once the battery passes 80 percent.
- Why does my phone battery drain faster when it is cold or hot?
- Batteries work best in a mild range. Heat can damage the battery for good, while cold slows it down for a while, and both make the percentage drop faster than usual.
- Should I let my battery drain to zero?
- No, you do not need to teach the phone its battery capacity by running it flat. Google says you can charge as much or as little as you need, and occasionally draining below 10 percent is enough.
- Does dark mode really save battery?
- It helps on phones with OLED screens, where black pixels use almost no power. On older LCD screens, the saving is small, so brightness matters more than the theme.
