How often do you charge your phone?

I charge my phone twice a day, without a specific time in mind. I usually use my phone till it has only 50% or lesser before I send it to the charging port. Sometimes, I only charge it once per day if I am not using my phone much during the day. On other days when my phone is being used by me for hours, I will need to charge it twice a day in order to keep it running.

This is assuming I only mainly use it for surfing the net. If I am playing games on my phone, I would probably need to charge it even more often. I remember my phone has stronger battery when I first bought it. Now that it has been with me for almost 2 years, the battery seem to drain faster than before.