Are you satisfied with your phone's battery?

I am a little bit disappointed at my current Samsung Galaxy S3 stock battery life. It worked great at the first couple of months, however, since I usually use data on it a lot--- browsing websites every day, texting a lot, watching YouTube and playing games sometime. Honestly, if I unplug my phone early morning and the battery may leave 1/3 in the afternoon. Now I have to relied on extra batteries, I take these batteries from great manufactories like MPJ around if I am away from a charger in airport, shopping mall or just on the go. I am thinking of getting a Note 3 and bought a bulky battery for it .