cant figure out crappy battery life.

heres a screenshot of my battery usage.
it shows the typical screen/system and facebook as the biggest battery hogs.

but its a sudden change in total life of the battery .
I used to come home with 30-50% battery after a day of medium usage. now its dead by the time I get home every day.

I went to nyc and it was draining like gasoline in a 7 liter v8 truck

and still doing it
before that it was great no problems at all
sudden change in battery life I cant find any apps or anything
I don't belive I installed any apps to cause this.


heres the chart.
at first I thought it had something to do with the signal it looked like it would drop considerably when I had bad data signal
but then it doesn't look like it anymore in this chart