iPhone 4s battery usage time?

i ran iphone 4s's battery down 5% , got around 5 hr of usage time , around 13 hrs of standby time since last full charge. out of 5hrs of usage time, 1 hr used calling, , rest emails, browsing internet, , music. no videos or 3d games. normal or wrong battery? what's normal range of battery usage time?

first iphone , i've had 2 weeks. don't have compare with, other ipod touch 2nd gen, seems have better battery life though it's 2 years old.

also, 30 min call, noticed phone became warm. ok?

 

if think there's problem take apple.

 

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