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How much does screen brightness effect battery life?

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Mansevolver
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Default How much does screen brightness effect battery life?

I normally keep my Note 3 at 50% brightness. Any idea how much more power it would draw at 100%?

Although AMOLED isn't as power efficient as LCD, the fact that each pixel is self-lit, thus no need for back lighting, I assume brightness and impact of power draw on AMOLED is very trivial?

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micmars
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Quote:
Originally Posted by Mansevolver View Post
I normally keep my Note 3 at 50% brightness. Any idea how much more power it would draw at 100%?

Although AMOLED isn't as power efficient as LCD, the fact that each pixel is self-lit, thus no need for back lighting, I assume brightness and impact of power draw on AMOLED is very trivial?

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Even though there is no backlight, screen brightness is still the number one power draw for most, irrespective of screen technology. Further, the blue subpixels draw a lot more power than the reds and greens draw (might explain Sammy's godawful color palette).

Based on my own experience, I believe that the relationship between screen brightness to battery drain seems pretty linear. As the device and battery age, this may change, or just get worse but remain linear.

Once you factor in the possibility of screen burn-in, which is what you could get if having it sit on the same fixed image with brightness dialed way up over protracted periods, it's recommended that you dial it down whenever possible. Your device, battery and wallet will be pleased.

If another more knowledgeable on this than I cares to weigh in, please do.

I hope this helps.

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bump.
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micmars
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bump.
I just reread your question, and I believe that increasing screen brightness to max from a setpoint of fifty percent and leaving all other settings as-is would likely cut your battery life in half.

You could answer your own question pretty quickly. Put a 2 hour high definition video on your SD card, put the sound where you want it, and put the phone in airplane mode. Starting from a fully charged state, watch the video, first at 50% screen brightness (deselect auto brightness), then again at 100%. At the end of the first viewing, take a screenshot of your battery draw, and fully charge your phone.

Post the results here. I'll do the same. Perhaps others could do the same, and take this thread in a slightly different direction.

I would caution that leaving the screen at full brightness on a regular basis could lead to screen burn-in.

I hope this helps.

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lesliescott06
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No idea what exactly the amount of battery will be eaten up, but more screen brightness always lead to more battery usage. I keep my mobile screen brightness at 25%. Its more than enough to operate the device.
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No idea what exactly the amount of battery will be eaten up, but more screen brightness always lead to more battery usage. I keep my mobile screen brightness at 25%. Its more than enough to operate the device.
I think it varies greatly by individual as to the desired screen brightness. Indoors with indirect light, I still like mine set mid way between full and zero. Any lower, and I can't stand it.

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