Whether its normal or not depends on how you use your android device. The battery consumption depends on how much and how long you use your android device. If you run alot of applications continuously, then you will most likely experience alot of battery drain. If you also charge while using your device with heavy apps, then you will lose your battery really fast; that means battery going dead.
Some tips on maintaining your battery life and power;
1. Check the idle running background apps draining your power
2.Ensure you regulate the backlight on your screen, during the night reduce the brightness and during the day make it average.
3.Only turn on GPS, GPRS and Bluetooth when you have to use them.
4.When charging your device, don't use it to play games or run heavy apps that use alot of power.
5.Its also important to carry a back-up power source or extra battery so you will not let your battery drain off and switch your device off, this also reduces your battery's life. Preferably charge it when its at 20% but never let it get to 5%.