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AMOLED: Black wallpaper = Battery saving (experiment result)

OP gogol

9th April 2010, 06:26 PM   |  #1  
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If you followed our discussion in this thread:
http://forum.xda-developers.com/showthread.php?t=657702

It is about "AMOLED: Black wallpaper = Battery saved?"

As I promised, I have done a simple non-scientific experiment:

Quote:

(1) At maximum brightness, screen on for 15 minutes
- Default wallpaper will consume about 5% (from 36% down to 31%)
- Pure black wallpaper will consume about 3% (from 30% down to 27%)

(2) At brightness = 20+%, screen on for 15 minutes
- HTC Black wallpaper will consume about 2% (from 26% down to 24%)
- Default wallpaper will consume about 3% (from 23% down to 20%)

All the above experiments was done in this condition:
- Wifi OFF
- Mobile network OFF
- GPS OFF
- Bluetooth OFF
- Screen at home screen with default HTC clock (white background with weather)

* The HTC Black wallpaper is available by default when you choose HTC wallpaper. It is not pure black, but it is still black

So, conclusion, using black background will save you battery life. The above experiments were conducted at 15 minutes each and you immediately see the difference.

I would say at low brightness, 20% - 25%, you will get 1% up to 2% battery saving per 15 minutes, let say 1.5% per 15 minutes. For 1 hour you will get about 6% battery saving.

Of course, of course, I know, who will stare at the home screen for 1 hour? But who knows? In the course of the whole daily use with the phone, how long do you think you scroll left and right in the home screen?

Or imagine you are browsing XDA forums a lot, every day. It would be better using the Android XDA app by Tapatalk because it uses black background instead of browsing via web which uses bright yellow background!

Also see how the brightness affect the battery life. My eyes is happy with about 20+% brightness

Again, this is non-scientific experiment, but it should give you rough idea how much your amoled screen uses battery power

PS: Yes, I have nothing to do this afternoon Too much time, He he he ...
Last edited by gogol; 9th April 2010 at 06:30 PM.
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9th April 2010, 06:31 PM   |  #2  
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i said so

thanx for conducting the experiment, this proves to people that say "black bg doesnt effect and is not worth it"
9th April 2010, 06:39 PM   |  #3  
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I just changed my default web browser home page, from:

http://www.google.com

To

http://www.blackle.com/

They will give you the same search result but really different background color.
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9th April 2010, 09:46 PM   |  #4  
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Quote:
Originally Posted by gogol

If you followed our discussion in this thread:
http://forum.xda-developers.com/showthread.php?t=657702
It is about "AMOLED: Black wallpaper = Battery saved?"
As I promised, I have done a simple non-scientific experiment:

Thanks for sharing but I don't have an Amoled screen to go and sit in the dark
I will charge earlier with bright vivid colors after 48 hours

Cheers,
9th April 2010, 10:39 PM   |  #5  
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Quote:
Originally Posted by gogol

I just changed my default web browser home page, from:

http://www.google.com

To

http://www.blackle.com/

They will give you the same search result but really different background color.

thats just madness mate
21st April 2010, 12:03 AM   |  #6  
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Very very nice!! I am just using night mode on amoled screen using ebook reader with brightness off, i just say that energy save is uncredible.. Thank you!!
4th July 2010, 04:14 AM   |  #7  
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Red is better on the battery.
4th July 2010, 05:19 AM   |  #8  
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The Black Color Keeps And Saves the battery longer cause they turn the display and the LEDs completely OFF , that's a LED Display characteristic to turn off the leds of the area it want to show BLACK color & the main advantage ( ithink ) over an lcd , since u''ll have a "pure black" and saving power , but on a lcd even how much the LCD is of a high quality it's always ... grey ( since there is always a BACKLIGHT )
Last edited by SkyWalker1726; 4th July 2010 at 05:25 AM.
4th July 2010, 08:11 AM   |  #9  
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what a pointless experement get a job lol
4th July 2010, 09:01 AM   |  #10  
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at night what's the best option to turn airplane mode?

i need alarm to wake me in the morning tho.

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