Hi.
Was thinking of upgrading to the iPhone 5 because I heard people say it has a better battery life but after doing some research it looks like it has a worse battery life.
http://www.ilounge.com/index.php/reviews/entry/apple-iphone-5-16gb-32gb-64gb/P7
Why do some people say its better? Placebo, maybe.
Your research consists of skimming an article where the author with no testing or evidence to support his claims at all assumed that the iPhone 5 would have worse battery life because the processor is faster and the screen is bigger.
This is like getting your chemistry advice from a superman comic book. It's so poorly informed it almost gave me a brain Anurism.
The iPhone 5 battery life is the same or better than the iPhone 4S with no perceptable difference. Stop worrying.
IPS screens with a built in touch layer like Apple's screen require less power (though bigger screens require more power so this may be a draw or take slightly more power), faster porcessors require less power and the 4G LTE hybrid chip that Apple developed as a first uses the same amount of power as a regular 4G chip which is why the iPhone 5 has so much more battery life when using LTE than the Galaxy S3 for example. The iPhone 5 also has a bigger battery.
If you're really really worried about battery life get a battery case and have a phone that has as much battery life as you want.