Iphone 4s users please tell if its normal? - 1

IPhone 4s is on ios 7, if I completely charge it, then I set brightness about 30 percent out of hunderd percent, and start downloading, browsing, playing games continuously.
And after 3hrs & 15 minute its charge is fully depleted.

Yup its normal battery backup is really bad! Mine is even worse then yours, maybe because its 6 to 8 months old…