Does auto-brightness drain more battery life?

It uses more battery than if you have auto-brightness off and the brightness level is set to very low

Basically, it depends on how often you're in dark areas versus light ones... if you're in the dark all the time, your auto-brightness will cause your phone to be very bright all the time, so it will use a lot of battery. However, if you're always using your phone outside in the day, your auto-brightness will make your phone have a dim screen which would use very little battery life comparatively.

I know this is an old thread but those who still come here.. The iphone auto brightness has the opposite effect of a keyboard. In low light the brightness decreases so your eyes don't hurt, and when its very sunny outside it becomes brighter so you can see the screen.

YYes Amy is wrong about this, your iPads auto brightness increases in sunlight and darkens in the dark to stop glare, it is not competing with another light source so it dims.

in the house I get 10-12 hours with my iPad Air

outside I nearly get 8 hrs.

my ipad Airs battery life is terrible though, my iPad 2 regularly gets 15-18 hrs even now it's two years old.

h4ndcrafted wrote:

YYes Amy is wrong about this, your iPads auto brightness increases in sunlight and darkens in the dark to stop glare, it is not competing with another light source so it dims.

Amy may have been incorrect about when auto-brightness causes brightness to go up or down. However, she was correct that leaving the phone set on auto-brightness uses more battery life than turning it off and setting brightness down fairly low.

I Can't see where anybody has said she was wrong about that ?

h4ndcrafted wrote:

I Can't see where anybody has said she was wrong about that ?

I was adding clarifying information to your statement.

I Personally think that the light sensor or the algorithms responding to it on the iPad Air are a bit iffy anyway. Auto brightness seems much more erratic on the two iPad Airs I've had than on previous models.

maybe it is just since IOS 7 ?

anybody else finding this.