With smartphone makers cramming ever-bigger batteries into their devices — the Galaxy Note 9 offers a 4,000 mAh power pack, for example — it's clear just how important battery life is to your mobile device. After all, the most feature-rich phone in the world won't do you much good if it's out of juice. But you don't necessarily need a smartphone equipped with a mega-battery to get through the day. Equip your current device with a good battery monitoring app, and you can get detailed information on the state of your battery's health. Some of these apps even come with power saving features that help you configure device settings in order to maximize your battery life. (Image Credit: Thomas Deco/Shutterstock)
Back-end changes to iOS 10 onwards have made it more difficult for apps to access detailed battery technical info, but there are still ways to check out battery wear and other statistics, such as through Coconut Battery. The free utility allows users to pull up stats such as current charge and charge capacity vs design capacity, charge cycle counts, and battery temperature for an iPhone or iPad plugged in to your Mac. An upgrade to a premium version allows you to check battery stats wirelessly (if Wi-Fi syncing is enabled through iTunes); there's also an info viewer for other device settings.
Amplify takes advantage of root permissions to help users rein in how often apps and services in the background can wake up your device, reducing how much power your phone uses when idle or on standby. Helpfully, Amplify comes with handy descriptions of common battery hogging services, complete with recommended settings for reducing their battery drain. The free version of the app allows you to configure a number of common battery hogging alarms, wakelocks and services, such as NipWakelock, ALARM_WAKEUP_LOCATOR, and others. An in-app purchase unlocks a Pro Pack that provides you with complete control.
Servicely is another app that takes advantage of the power of a rooted system to prevent apps and services from waking your device even when the screen is off, saving you battery power by preventing your apps from executing background tasks. You may selectively disable running or installed apps, as well as services when your screen is off, though be warned that this is likely to break features like notifications and alarms, or in the case of services, even break your system, so use this with care.
Battery Doctor is a free and feature-packed battery monitor and energy saving tool for mobile devices. Battery Doctor allows users to quickly look up battery charge status as well as track down what apps and processes are draining battery life. You can quickly toggle power-hogging settings from within the app and its widgets, such as brightness, Wi-Fi, GPS, Bluetooth and mobile data (though you should probably skip the Task Killer). A particularly useful feature is the ability to define power saving profiles and automatically schedule them, so that, for example, you can set the phone to automatically switch to airplane mode when you're asleep or in class.
Battery Saver 2018 is another app that combines a variety of battery-saving system features and settings to provide quick and easy profiles that should help extend your how long your phone lasts on a charge. The main screen displays battery life, a power saver mode switch, toggles for a variety of device settings and assorted battery stats and expected runtimes. In addition to the power-saving mode, a sleep mode deactivates most device radios, and a custom mode lets you configure a variety of settings for your own power use profile. Users can also schedule power-saving modes for particular times, like work, sleep and so forth.
Power Battery combines a variety of tools into one package, serving as a battery monitor, battery saver and fast charging tool. The app lets you view battery consumption data, including which apps blow through the most power over time, while a variety of power saving settings and presets let you tweak your settings to eke out the most time from your available juice. Finally, a charging tool kills background apps and provides a charge time estimate while plugged in. Extras include a memory booster and junk file cleaner.
dfndr battery is a battery monitor and energy saving app that provides useful info about the state of your battery's health, as well as a variety of ways to conserve energy throughout a full day of use. The battery monitor features provide data on your charge status, battery temperature, and battery capacity, as well as estimates of how long your charge will last with a variety of average use cases, such as gaming or media. On the energy-saving side of things, dfndr battery comes with a background task killer, customizable performance profiles that can trigger based on time and location, and a screen-saving feature that cuts brightness to save power.