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I have an LG P990, and I recently upgraded it to ICS. Since that charging is much slower, and energy consumption much faster. I could live with it, I charged it at work and at home too.

Yesterday however went from 85% to empty in one night. 49% of the energy consumption is Wifi, according to Battery usage.

So I want an aplication, that periodically turns wifi on, and after a few minutes off. Every program I was able to find did the first part, but when it found a known network, left it on indefinitely.

In the settings I have "Keep wifi on during sleep" set on Never. Does not help.

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András, please note I slightly adjusted your question to avoid it being closed as off topic (Is there an app for X?, see our FAQ). I also added an answer with some useful points you might want to check out before you put an additional app to use :) –  Izzy Feb 19 '13 at 15:31

4 Answers 4

up vote 2 down vote accepted

Before doing so, I'd consider two more things:

Finding the real cause

High WiFi usage is not caused by WiFi itself (standby), but most likely by another app constantly requesting it to "stay awake". So first check How to deal with (orphaned) WakeLocks? -- which also deals with this.

Checking your WiFi standby policy

In Settings→Wireless & Networks→WiFi, when pressing the menu button, an item named "Advanced" appears. Tap that to go into the advanced settings and check the Wifi Standby Policy. There are 3 options available:

  • Always: WiFi stays awake even when the display is turned off. Useful if you're streaming music.
  • Only when connected: Only when a power source is connected (i.e. the device is charging) -- as in that case the "battery consumption" usually is not an issue.
  • Never: WiFi goes to standby as soon as the display is turned off.

WiFi managing tools

If this requirement still is present after thoroughly checking above two points, there are multiple options available in this section -- enough to fill at least a small book. First, there are tools like e.g. JuiceDefender or GreenPower, dealing not only with WiFi and mobile networks, but covering a lot more energy saving stuff. Other interesting tools might include WifiBatt and many others -- just check the related apps on their playstore pages, or use Mapsaurus to find similar apps.

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I have tried JuiceDefender earlier today, wifi settings can not be changed in the free version, or it has the most confusing UI I have ever seen. –  András Feb 19 '13 at 16:14
    
As I said in the opening post, Never is set in Wifi Standby Policy. Thanks for the other tip about WakeLocks –  András Feb 19 '13 at 16:16
    
You're welcome. I added the other part although for completeness, so if other "searchers" check they see this is an important part to check. As for JuiceDefender: I tried it long time ago, and yes: configuration can be a bit confusing. They have a feature comparision on their homepage (end of the page), just in case you want to check. That page also gives an overview of what you can do with it and how. –  Izzy Feb 19 '13 at 16:24
    
I would not recommend GreenPower. After setting it up the wifi ate much less, but GreenPower itself became the second largest consumer of electrons. Only a slight improvement overall. –  András Feb 20 '13 at 7:53
    
That might be device specific. Did you contact the developer? Any logs (logcat) captured and sent along? –  Izzy Feb 20 '13 at 9:55

I just installed this application called Silence. It turns on and off settings based on a schedule.

That is EXACTLY what you asked for but like the others I suspect your issue is a run-away app using too much WiFi

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You could try Sentry. It also has a paid version.

Tired of accidentally leaving your WiFi running all day and wearing down your device's battery? Tired of being home for hours and forgetting to turn on your WiFi? Sentry can help!

Sentry is a fully automated WiFi manager that only requires a simple configuration to start. It packs many features into a simple-to-use application so you don't have to waste any time on setup.

Sentry operates by cycling your WiFi. If it gets a connection or was already turned-on and connected, it remains on, otherwise, it turns the WiFi off to save battery.

Even if Sentry is activated you can still manually connect to WiFi or turn your WiFi without interrupting.

Sentry can be configured to run in any or all of three ways.

First, Sentry can be configured to run on a polling interval, e.g. 30 minutes, and check the WiFi status periodically.

Second, Sentry can set to check WiFi status every time the screen is unlocked.**

Last, Sentry can be set to run every time the phone boots up. Used in conjunction with the other two functions, this can either be used to make sure Sentry is always running or to simply check for WiFi every time the phone reboots.

Does Sentry running in the background use up my battery life? Nope! Not one bit! Sentry is actually only ever truly running when it's cycling the WiFi, which depending on the timeout you set, shouldn't be for much more than a minute, so no, it shouldn't negatively affect your battery life.

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"Sentry operates by cycling your WiFi. If it gets a connection or was already turned-on and connected, it remains on, otherwise, it turns the WiFi off to save battery." This is exactly what I said I do not want. –  András Feb 19 '13 at 15:35

Some of the Norton apps may work, something like the Norton Task Manager. They have useful functions inside their apps.

Or, just search for "wifi disabler" in Google Play.

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