Battery life is one of Android's biggest mysteries. You may think you're doing everything right to preserve it's power, but still find yourself scrambling around for a charger halfway through the day. If this sounds like you, then this tutorial will help you understand why your battery is draining so quickly.
First thing's first. We need to learn the behavior of our battery to locate the problem and subsequently to find a solution. To get a better understanding of what makes your battery tick, go to Settings > Battery. If you find apps on this screen that are using up more battery than they should be, close them by tapping Force stop. Also, check out this AVG report on the apps that drain the most battery - you may be running several of these on your phone.
If you want to go into more detail about your smartphone's battery usage, you'll find a number of apps in the Play Store that provide statistics and detailed information on battery consumption. We recommend GSAM Battery Monitor. Once the app's installed, it takes a couple of days to gather data on your smartphone and battery usage, then after that it'll give you a great overview over what's using how much battery on your device.
Your display is a big fat battery hog
Your smartphone screen is one of the biggest battery drains. A few years ago, your screen would only consume around 15 percent of your battery in one charge, though in today's age of huge QHD displays, this figure has grown to over 20 percent. If the figure exceeds this, then you need to fix it.
A simple case of lowering the screen brightness. You may be tempted to use your smartphone's automatic brightness mode - which adjusts the screen according to its surrounding lighting conditions - but we don't recommend it, because the very process of calculating surrounding light conditions uses up battery. We recommend setting the brightness slider nice and low on your display (so long as you can still see the screen clearly), then raising the brightness only when you have to.
Batteries don't live forever
If your smartphone is a couple of years old, the sad truth is that its battery might be dying. If you don't have a lot of background processes running and are keeping your screen brightness down, then it's worth reading our review of your phone, and comparing our battery experience to yours. If yours is considerably lower, it might be time for a change. Manufacturers often say that a battery should perform well for up to 1000 charges, but that depends on many factors.
If you have a smartphone with removable battery, it's simply a case of buying a new one (a major advantage to choosing a smartphone with removable battery). If your phone has a non-removable battery then type "remove [your phone name] battery" in the AndroidPIT search bar and we could have a guide showing you how to remove it. Be warned though, that this will void your smartphone warranty.
The charger does not work
If after a full night's charging, you notice that your smartphone battery drains super-fast, then it's worth checking first thing in the morning whether it actually fully charges. If not, then you're looking at a defective charger.
Check whether your cable works with another phone, or conversely whether your phone works with another cable. If your charger proves to be faulty, remember to only buy chargers from reputable manufacturers, otherwise you risk becoming the subject of those all-too-frequent news stories about phones setting houses and people on fire. No, we're not joking. Read up on the dangers of dodgy phone chargers.
'Android system' using too much battery
One of the biggest battery consumers on your phone is the 'Android system' service. This keeps your whole device running smoothly, so naturally uses a lot of battery, but it shouldn't be more than 25 percent. If it's using more than this, then you could have a problem.
This problem could be resolved by downgrading your Android device to an older Android version. We've got plenty of downgrade guides on AndroidPIT, so just search "downgrade [your phone name]" on AndroidPIT. Should this fail, then you may have to factory reset your device. Drastic though this may sound, it could ultimately be a simpler solution than downgrading your device, because to do that you need to flash it, which can lead to complications.
Google Play Services can be a drain
Google Play Services is another service that consumes a lot of battery. Unfortunately, you can't stop it because it's a crucial Android feature which lets your apps communicate with each other on your phone. Still, you can bring it under control.
Go to Settings > Applications > All > Google Play Services . Here, tap the Clear cache button. This should refresh Google Play Service and stop it draining your battery. Repeat this process once a month.