I had a big "WOW" again (2nd time today) when my battery went flat dead on me!!! I left home at 11 and was travelling by bus.. On my way back, at 3pm, it kept saying battery low, then went BOOM!!!

Is it a WOW because of the 4 hour battery time??
or is it a WOW because how much I got stuck to the phone that I used it till the last drop of juice in the battery remained??
I;m still confused.... Ive never had a phone give up on me at 3pm....

by the way, I fully charged it at night....