Most of our Android devices rely on batteries. The No.1 complaint of most smartphones, tablets, and smartwatches is probably the battery life.
When battery runs out of juice, all your mobile devices, expensive or cheap, are useless before you can charge them.
So, understanding Android battery usage is an important (and actually easy) skill that all Android users should have.
In all Android phones and tablets, battery usage is always reported. And the report is getting more and more accurate in recent Android versions.
Understanding Android battery usage matters if:
Although, in all Android phones and tablets, Android battery usage info is provided, some vendors may offer more or less info than others.
A few Android vendors may offer additional battery management tools. But normally, it is NOT necessary to install any third-party battery saving apps or task managers. They usually do the opposite: shorten your battery life. Android does not need any of such apps except a few debugging apps.
You can access Android battery usage page in at least two ways:
In the battery usage info page as shown below, you can find:
Tap anywhere on the plot (marked as 1 as shown below) to get a detailed view of the battery usage history since last full charge as shown below.
In battery usage history page, you can rotate the screen to landscape orientation to get a better view.
The plot is always starting from last full charge, or last reboot, whichever is later.
Below the plot, as shown above, some very useful info is given:
In addition to checking battery usage history, you can also check battery usage of individual apps in Android.
You can tap individual apps (marked as 2) in the battery usage page shown above.
In this guide, for example, you want to check battery usage by Google Play Newsstand.
The battery usage details of Google Play Newsstand will be listed as shown above.
In the battery use details page, you can check the battery usage details, including:
In addition to such detailed battery usage info of this app, you can also:
As mentioned earlier, screen on time (SOT) usually is a good parameter for battery life for your Android device. This is the actual time you can interactively use the Android device.
So, it is important to check screen-on time when you check Android battery usage.
Among the apps in battery usage page, you can find one for screen. Tap it to see detailed info of battery usage by the screen as shown below.
You should read the Time on field to determine whether your Android devices have any battery life issues.
Of course, you should use this screen on time together with Awake state mentioned above to find out the cause of any possible battery issues.
Since Android Lollipop, Android introduced battery saving mode.
If you know that you will not able to access a charger for extended period and you may want to get a bit longer battery life, then battery saver mode may help you.
In Settings–apps page, tap menu icon (3 vertical dots) to get Android battery usage menu as shown below.
Tap Battery saver (marked as 1) as shown below to manage battery saving mode.
In Battery saver page, you can then turn on/off battery saver. When battery saver is on, you can choose to turn it on all the time, or when battery level is lower than certain levels.
For more details on how to use battery saver to reduce Android battery usage, please check this guide.
Please note, if your battery can last till you access a charger, it is NOT recommended to turn on battery saver for my Android phones. Some apps may not work properly in battery saving mode.
Since Android Marshmallow, battery optimization has been added. You may check this guide on how to use battery optimization in Android Marshmallow.
You should check the official user manual for your device on how to charge, maintain and use the battery properly.
In all Android devices, these are some best practices to maximize battery life:
If you have any questions on Android battery usage, please let us know in the comment box below.
The community will help you.
For other Android guides, please check our Android 101 page.
For any questions or problems with Android Marshmallow, please check our Android Marshmallow Guide page.
If your question is about Android Lollipop, please check out Android Lollipop Guide page
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Dear Sirs,
I´ve got Sony X. Z3 Compact. About a month ago it was updated from A. 5.1.1 to A. 6.01. I was searching for more informations about Marshmallow. I was lucky I found Your website. The most important for me is the battery, it is not changeable. Thrat´s why I want to také care about it and do my best. The common knowledge is - the lifetime of the Li-ion batteries is cca 500 cycles, it means 100-0-100%. I have read the articles from "Battery Univesity Group" too (batteryuniversity.com), e.g. BU-808 How to Prolong Lithium-based Batteries, BU-808c What the User Can Do, and many others. And now I´ve got a smaller dilemma. The informations about the charging are a bit different from Your article "Understanding Android battery usage - Android Guides. "charge the device only when it is needed. Topping-up battery frequently is not a good idea", etc. The article: BU-809 How to Maximize Runtime: "Do not discharge Li-ion too low, charge more often. A random or partial charge is fine.Li-ion does not need to be fully full charged".
I. question: what is the truth and what is better, e.g. the cycles 50-100-50%?
II. question: what are You thinking about the Apps like: Battery Life Repair Pro, Battery Repair Life, etc.? Are they usefull, or they are only a toy/fake?
Thank You very much indeed for Your answer.
Yours sincerely
Marcel Šimandl
Louny, Czech Republic, Europe
There's so much contradicting info on smartphone battery. Unfortunately, none of them is based on scientific research in real world situations. Also, the variations of battery quality are very broad. For example, the shelf life of the battery can vary from 2-4 years.
For your question 1). I'm against unnecessary top-ups. This simply strain the battery more. Of course, it's only based on my understanding, experiences and discussions with some engineers. 2). Never, never and never use such apps. Most of such apps will not help. You need to learn how to read battery usage (Android provide very detailed battery usage info already in recent versions), and fix the issue only when you find one. Don't assume there are battery issues.
For non-removable battery, you may consider to change it in about 18- 24 months. Most service centers may only stock such batteries within first 2-3 years only. It's harder to get the battery after 3 years usually.