Whats a verygood android launcher that doesnt drain battery or slows down the phone?

I use Nova Prime Launcher. They have a free version you can try. I don't have any battery issues with it.

I don't know how an app can tell whether or not another running a app can be terminated. If it's running, maybe it's doing something important or it's the app you are using. You wouldn't want your app you are using to suddenly close.

If you are talking about a task killer, they are available and they are not recommended. The reason is that they tend to conflict with how Android manages system resources. Android loads apps into memory that it thinks you are most likely to use in the future. That way, when you launch them, they start faster if they are already loaded into memory. If you use a task killer, what happens is the task killer stops the app then Android will load it in again. This cycle can keep going causing your battery to drain faster.

My phone will typically last about 5 hours with the screen continuously on before it runs out of batteries. If I'm using a mapping app when driving, it lasts half that. I usually drive with my mapping app on and streaming music via BT audio. For long drives, I use a car charger.

 

Greenify will tell you which apps you can hibernate without causing issues. To find which apps are draining your battery you need to establish if any background tasks are preventing the phone from sleeping. Try Wakelock Detector.

 

The secret to battery life isn't to use some app which tries to control what is running (often conflicting with the OS and wasting power) but to find out what is draining the power and address any inefficiencies that are identified. So my advice would be to install a monitor like GSam Battery Monitor, run through a cycle of your normal usage, then see what the big power drains are (which apps, whether the device is being held awake).

Your battery is bigger than most, but gaming is particularly draining for batteries (playing music over a wired connection shouldn't be too bad, movies mean a couple of hours screen on so you'll chew through a fair amount of power that way). You don't say what you mean by draining "fast", but with the usage you describe turning the screen brightness down may be the most effective power saver.

 

Nova works great for me.
It is light fast and easy to use.

 

Nova Prime rocks! Very quick, and highly customizable.

 

1. Nova prime. But despite how light a launcher is, how much it slows down the phone is a factor of how you set it up.

2. Battery saver apps mostly work by turning the screen brightness down at certain times, turning off autosync except at set intervals, as well as controlling data so it won't go wild. Controlling what apps are running in the background through an app will actually make the phone eat battery faster. Battery saver apps try to disable as much as possible during phone idle time. The idea is to give the phone bigger idle time, but still keep it running at max capability when being used.

 

Give it time. An average won't mean anything until it's had some usage anyway. Though that said I've never seen either symptom (those items are not the reason I'd use it though).

 

I don't use any battery extender apps. I instead bought an extended battery for my SGS3.

I do use a battery widget called Battery Widget Reborn. This app/widget does give you an estimate of the amount of battery life you have remaining. The estimate is generally based on your average usage over a period of time. Here is the app: https://play.google.com/store/apps/details?id=net.hubalek.android.apps.reborn.pro&hl=en

My extended battery is 3500mAh. I think the standard SGS3 battery that comes with the phone is only around 2000mAh.

 

I tried a few "battery saving" apps, but they just ended up making my phones performance degrade.

If your gonna spend 2 hours watching videos, and play games along with all the normal use, it... Texting phonecalls, Internet, and the like then you're gonna see a large battery drain.

 

The phone radio is what keeps u connected to ur service provider for network and phone calls