I replaced my battery recently (about a month ago) i went to the mall no problems with the car. about an hour later i come out and start it and as soon as its about to start up the battery light comes on and the engine doesnt turn on. i tried again and it immediately started... is this anything to worry about? im just a little pissed off since i had just replaced the battery lol.

 

check the connections to be sure the cables are clean and tight.
Take the car to any parts store for a free alternator- starter- battery test and make sure everything is ok.
Even brand new parts fail- or something else is part of the real problem