My new iphone battery not lastng long is it normal?

I got a iphone 5 the other day from walmart new i opend it it was dead had to chrage it then i could use it so i did battery didn't last to long so someone said let it die and the charge it so i did and today i have been on it well it says for 2 hours and its already at 24% so i want to know is it normal and what can i do to make it last longer or is the more i use it and charge it make the battery last longer someone tell me iplease

Set up an appointment with Apple's genius Bar. Just serach genius bar on the internet and make sure it says apple somewhere in there. Take it to the nearest one and they should replace it, free of charge.