Help with battery powering 5m 12v LED strip
So first off, I have 5m of 12v Leds from here. http://www.amazon.com/gp/product/B0085UPTT4/ref=oh_details_o01_s00_i00
I would like to battery power them for at least 2 hours at a time minimum, and I was considering splitting the strip into two 2.5 strips and putting a battery pack on each. But I know nothing about electricity and math has never been my strong suite for figuring amps and whatnot. I've heard that I will need a resistor and batteries weighing pounds to run just a few hours!
Help would be greatly appreciated.