IPhone 5 battery lasts 4-5 hours?

My iphone 5 battery lasts about 4-5 hours of normal usage, eg, surfing web, some music, maybe some app usage, ect. Everything that can be is either disable or enabled to optimise battery life. Is this normal, or should I return it to Apple?

Added (1). @Ross M, I just said that I've done everything possible that can be done to optimise battery life, I just need the question answered by other users if this is normal to get 4-5 hours of usage. Read the description before answering next time.

Turn brightness down, turn bluetooth off, turn location services off

Same problem, i have followed every guide to "maximize" battery life, nothing works. Apple is a big scam.

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