Why does my Galaxy S3 battery drain the screen at 34?

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galaxy S3 battery drain screen at 34%

My wife and I each have S3s purchased withing 6 months of each other about 2 years ago. Her battery drains to shut down level in 5-6 hours, mine lasts about 12.

I have unified all the power saving options I can find in both setups but one major difference I find is the percentage shown for "Screen" in the battery details. For her it shows 34% but for me it is only 6%.

When I touch screen to drill down to more details and go to brightness hers is set super low at about 6% while mine is high at about 30%.

What the heck! Based on these settings mine should be the one draining the battery with the screen.

Any suggestions on what is going on and how to get back her battery life?
Thanks.
 
Re: galaxy S3 battery drain screen at 34%

Welcome to the forums. Something to keep in mind is this: If she turns her phone on a lot more than you do, that can still account for the drain.